VG-330 Cobra Hardware Reference Manual
Contents
1. Draft 11 14 96 111111111111140 98809 Od e qneduio vara EZ VIOWOd A97 JONGOSUEJ J N OSULIL ered xa ul poJ eJJu CH ELA PER Ne AO RR m ERE EMO lt peregul XL ul s eufiis C V gt 8r LXVIN enas 1Jezniiq pue eq jeueg 007 Jeyng Nuwas 19z1 161q uoje1 7 0 52 JOAIGOSUEJ Klos uda z K 0 9 do an lo ezlv INOHd3 HSV1J HSV lJ diuo ejBuis yoojg 22909 anbi 1 5 Block Diagram 1 6 Demonstration Kit Figure 1 2 Demonstration Unit 1 7 Operating Cobra Cobra s main components are shown in Figure 1 2 Main Batteries 2 AA Digitizer Pad Printed Circuit Board LCD Panel External Power Input On Off Switch Reset Switch Backup Battery Infra Red Card Transceiver 5 52. Cobra VG330 Single Chip Hardware Reference Platform Technical Manual Cobra VG330 Single Chip Hardware Reference Platform Technical Manual Document RM230001 02 Copyright 1996 Vadem All Rights Reserved Information furnished by Vadem is believed to be accurate and reliable However no responsibility is assumed by Vadem for its use nor for any infringements of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent or patent rights of Vadem Vadem reserves the right to change specifications at any time without notice Trademarks mentioned herein belong to their respective companies Medical Disclaimer Vadem s products are not authorized for use in life support devices or systems or in any medical applica tions and cannot be used in such applications without the written consent of the President of Vadem Preface This manual is the primary reference and user s guide for the Vadem Cobra VG 330 Single Chip Hardware Reference Platform commonly referred to as Cobra in this manual Audience This document assumes that you have some familiarity with personal com puters microprocessors and related support devices The people who ben efit from this book are Managers and engineers who are considering the use of Cobra in a por table design Related Publications VG330 Product Data Manual DMS30001 VG330 OEM BIOS Specification DM330002
3. P Channel MOSFETs um d CHO Me e VSENSE onverter CH1 R22 100 xi Yi Digitizer X2 Y2 1 1 046 5 03 Q3 and Q4 are SWCTRL1 8 2 N Channel MOSFETs SWCTRL2 gt R24 R23 50 50 GND GND The VSENSE signal is used for detecting pen down see schematic page 7 Table 1 2 Switch States for Digitizer Switch State State Q1 Q2 Q3 Q4 Waiting for pen down Closed Open Open Open Pen down scan X Open Closed Open Closed A D converter reads CHO Pen down Scan Y Closed Open Closed Open A D converter reads CH1 Hardware Description Figure 1 8 1 8 2 7 Liquid Crystal Display The LCD used is a Sharp LM320081 passive matrix LCD It has an integrated decoder for the external 4 bit parallel data bus and has the following basic specifications Table 1 3 LCD Specifications Parameter Value Dot size 28 mm Dot pitch 30 mm Pixel Resolution 320 dots W x 240 dots H Active viewing area 100W x 76H mm LCD Block Diagram FRAME LCD COM driver 320x240 Dots LOCLK SHCLK e SEG driver LCD 3 0 VCC_LCD VSS BIAS circuit VEE 1 9 Bill of Materials Table 1 4 Bill of Materials Item 1 Quantity Reference Note Vadem chose the Sharp LCD used in the demonstration unit for size quality and availability Designers may of course select their own choice of vendor for the LCD Panel Samsung s UG32F07FNBRX A panel is a low cost alte
4. Cobra contains the following items Enclosure PCB Operating System in FLASH ROM Modem Card for Internet Access Two AA Batteries This Technical Manual Vadem VG330 Data Manual Cobra is easy to use Follow these steps to prepare it for use 1 2 3 Install two fresh AA batteries Install the modem PC Card card in the PC Card slot Push the ON button Follow the instructions on the LCD screen 1 8 Cobra includes a PCB with its components and a small form factor digitizer tablet Hardware overlaid on an LCD The LCD Digitizer can be replaced by an LCD Digitizer of the Description customer s own choosing allowing any size to be considered 1 8 1 The Cobra PCB contains the following principal hardware elements as shown in Printed Circuit Figure 1 3 and Figure 1 4 Board PCB VG330 single chip PC platform 2MByte of DRAM e 4MBytes of FLASH memory configured as two 1M 16 flash ROMs e Power Supply Unit e LCD display e Digitizer touch panel using 10 bit A D converter 0330 Firmware BIOS PC Card Slot Figure 1 3 Cobra PCB top EDEN U24 U23 LM393 MAX749 U10 U14 74HC191 741 VT125 026 021 m u9 U13 is T us g id NS 148 74LVT244 1 U17 11111111111 TTTTTTTITITI FLASH EPROM U1 us 74LVT16245 74LVT16373 Hardware Description 1 7 Figure 1 4 Cobra PCB
5. 1 5 1 6 1 7 1 8 1 1 1 2 1 3 1 4 Introduction Features System Architecture Design Objectives Block Diagram Demonstration Kit Operating Cobra Hardware Description 1 8 1 Printed Circuit Board PCB 1 8 2 Hardware Component Descriptions Bill of Material Cobra Block Diagram Demonstration Unit Cobra PCB top Cobra PCB bottom VG330 Block Diagram MAX148 A D Converter Block Diagram Digitizer Electronics LCD Block Diagram Touch Panel Specifications Switch States for Digitizer LCD Specifications Bill of Material 1 1 12 1 3 1 4 1 4 1 6 1 6 1 7 17 1 8 1 15 1 5 1 6 1 7 1 8 1 9 1 11 1 13 1 14 1 12 1 13 1 14 1 15 vi Contents Cobra VG330 Single Chip Hardware Reference Platform This document describes an application of Vadem s technology capabilities to a por table low power system the Cobra VG330 Single Chip Hardware Reference Platform commonly referred to in this document as Cobra 1 1 Vadem provides enabling technology for hand held electronic data processing prod Introduction ucts It has expertise in single chip microcomputers and power management for low power handheld products Vadem has designed a custom low power single chip solution for OEMs wishing to create battery efficient handheld systems This can reduce the time to market for creation of new leading edge portable data products Vadem s technological knowledge backed by experience and numerous successful de
6. 3 Q3 Q4 Q6 ZVN3310FCT ND 31 1 Q5 PMBT2222A 32 1 Q7 ZTX750 33 20 R1 R2 R3 R6 R9 R10 R12 R13 R14 R18 22K 819 R25 R37 R70 R71 R72 R75 R76 R777 R78 34 2 R4 R39 100K 35 15 R5 R11 R16 R26 R27 R29 R35 R36 R38 47K 840 R44 R59 R61 R62 R63 36 3 R7 R48 R74 1M 37 1 R15 220 38 2 R17 R22 100 39 2 R20 R21 150 40 2 R23 R24 50 41 2 R28 R54 10K 42 1 R32 10 ohm 43 1 R34 12K 44 1 R41 450K 45 4 R42 R43 R45 R50 100K 196 46 1 R46 4 3K 47 1 R47 1 64M 48 1 R49 470 49 2 R69 R51 100 OHM 50 1 R53 470K 196 51 2 R65 R56 1M 196 52 1 R57 0 5 53 1 R58 43K 1 54 1 R60 3K 55 1 R66 600K 1 56 1 R67 4 7 OHM 57 1 R68 2K 58 1 R73 IM 1 59 2 TP2 TP1 TP 60 1 TP3 TP 61 1 U1 74LVT16245 62 1 02 74LVT16244 63 1 U3 74HC244 64 1 U4 74LVT244 65 1 U5 74HCT244 66 1 U6 MAX148 67 2 U25 U7 MAX8 11 68 1 U8 74LVT16373 69 1 09 74LV14 1 U10 74HC191 Table 1 4 Bill of Materials Item Quantity Reference Part Description 01 1 Ul zJJ MBMAViB160BTP 72 1 U12 VG 330 73 1 U13 74LV08 74 1 U14 74LVT125 75 1 U15 TPS1120D 76 2 U17 U18 LH28F016SU 77 1 U19 MAX777 78 1 021 74HCTOO 79 1 U22 MAX756 80 1 U23 MAX749 81 1 U24 LM393 82 1 U26 MAX858 83 1 U27 TFDS3000 84 1 U28 TPS1120 85 1 Y1 32 768 KHz 86 1 Y2 32 MHz Bill of Materials 1 17
7. VG330EVAL Evaluation Kit Users Manual DM330003 VG330ADPT BIOS Adaptation Kit Data Manual DM330004 VG330 Debugger Utility User s Manual DM330005 VG330 Configuration Utility Users Manual DM330006 VG330 Product Functional Description FD330001 VG330ICE In Circuit Emulator Product Brief PB330001 VG330BIOS Single Chip Firmware Product Brief PB330002 VG330EVAL Evaluation Board Product Brie PB330003 VG330 Single Chip Platform Product Brief PB330004 VG330ADPT BIOS Adaptation Kit Product Brief PB330005 VG330 Power Management White Paper WP330001 Cobra Software User s Guide Preface ii Conventions Used in This Manual Preface The first time a word or phrase is defined in this manual it is italicized The following signal naming conventions are used throughout this manual A level significant signal that is true or valid when the signal is LOW is preceded with an asterisk or slash An edge significant signal that initiates actions on a HIGH to LOW tran sition is preceded with an asterisk or slash The word assert means to drive a signal true or active The word deassert means to drive a signal false or inactive Hexadecimal numbers are indicated by the suffix h for example OAh Binary numbers are indicated by a subscripted 2 following the number for example 0011 0010 1100 11115 Figures Tables Contents Contents 1 1 1 2 1 3 1 4 1 3 1 6 1 7 1 8 1 1 1 2 1 3 1 4
8. bottom U2 011 LVT16245 DRAM U18 FLASH EPROM P28 0 5 Digitizer Connector 2 0 2 375 LVT244A Power 1 8 2 Hardware Component Descriptions VG330 Supply U5 HCT244 This section describes the main hardware components in more detail 1 8 2 1 Vadem VG330 The Vadem VG330 is a single 160 pin CMOS chip Vadem s custom design makes it easy for OEMs to develop low power yet cost sensitive DOS based personal elec tronic products The VG330 integrates the following as illustrated in Figure 1 5 82 MHz NEC V30MX processor 16 bit 80186 compatible CPU Card 240 ExCA JEIDA 4 2 controller e 8254 Counter Timer 16450 compatible serial port with HP infra red interface option e RTC Real Time Clock e LCD controller supporting CGA 640x200 AT amp T 640x400 VGA 640x480 monochrome graphics modes e Interrupt Controller XTcompatible keyboard interface scanning up to 101 keys and a matrix keypad scanner LIM 4 0 compatible EMS memory subsystem supporting DRAM SRAM or PSRAM Vadem Power Management Unit PMU e 24 GPIO General Purpose I O pins for flexible configuration of inputs and out puts ISA Bus controller capable of 8 and 16 bit memory and I O cycles similar to PC AT bus cycle
9. ce between XL and XR 250 to 760 ohms between YU and YL 250 to 760 ohms Linearity 1 Insulation resistance 10 megohm or more at 26 VDC Mechanical Tnput 0 8 stylus or finger Actuation force 10 80 grams Transparency Typical 78 Surface hardness Pencil hardness 3H or more according to IIS K6400 The touch panel operates by producing an X axis and a Y axis resistance value that corresponds to where the pen is pressed These values are read by passing a voltage through the panel on each axis and measuring the output voltage for that axis Refer to Figure 1 7 Refer to sheet 7 of the schematic for details of the MOSFET switches used in this design Switch Control signals SWCTRL 2 0 open and close the MOSFETs Q1 Q4 shown on that sheet and in Table 1 2 The digitizer output is read as follows hardware detection of pen down causes the firmware to control reading of one digitizer axis at a time For example the Y axis value is read by turning Q1 and Q3 on to provide a voltage across the Y axis of the digitizer sheet Analog voltage CH1 is buffered and sent to an input of the to D con verter where it is converted to a digitized value Designers may use their own choice of vendor for the Digitizer Panel Figure 1 7 Digitizer Electronics 3 3V Main 9 R21 R20 1502 150 09 74LV14 9 8 2 2 3 SWCTRLO ans Karer Qt and Q2 are R17 100
10. mode The present Cobra design uses single ended mode An auto calibration cycle eliminates need for offset or gain adjustment Conversion results are available through a serial output Figure 1 6 MAX148 A D Converter Block Diagram CS 18 scLK 2 Input DIN 17 g Shift Internal Register gt Clock 10 Control SHDN Logic 2 Y Y Output DOUT CH3 85227 Analog Shift 16 CH4 Input Register SSTRB CH5 8 i CH6 _ T H 7 B Clock xu In 4 14 10 2 bit DGND 2 SAR ADC 4 AGND Out Ref VREF 11 2 500V Hardware Description 1 8 2 6 Touch Panel The demonstration unit uses a GUNZE G 20 resistive touch panel digitizer It works in conjunction with custom pen driver software to display digital ink on the LCD dis play The performance specifications are listed in Table 1 1 Table 1 1 Touch Panel Specifications Electrical Parameter Value Maximum voltage 5 VDC Maximum current Less than 1 mA at contact point of top layer with bottom layer Operating temperature 0 to 50 C Operating Humidity 20 to 85 non condensing Non Operating 10 C to 60 C temperature Non Operating humidity 20 to 90 non condensing Terminal resistan
11. rnative 1 8 2 8 Power Supply Main power to Cobra comes from two AA batteries A Maxim MAX756 device steps up the battery voltage to 3 3V which powers most of Cobra s electronics A Maxim MAX777 device provides 5V to run the LCD panel and PCMCIA card A MAX858 device provides 3 3V from the lithium backup battery to maintain the system configu ration information while the AA batteries are being changed The Power Management Unit PMU of the VG330 supplies signals for controlling power to the ROM LCD and PCMCIA card These switches are implemented using a TPS1120D MOSFET switch The bill of materials for Cobra is shown in Table 1 4 Part Description 1 D6 1N4148 39 C1 C2 C3 C5 C6 C7 C9 C10 C12 C13 C14 C15 C17 C18 C20 C21 C22 C23 C24 C25 C26 C27 C28 C31 C32 C35 C36 C38 C44 C45 C46 C47 C48 C50 C53 C56 C57 C58 Bill of Materials 3 C4 C8 C43 100 pF 1 C16 0 00 uF 1 Clg 470 pF 2 C29 C30 15 pF 4 C33 C34 C51 C54 00 uF 2 C40 C37 22 pF 1 C39 0 0033 uF 1 C41 150 uF 2 C42 C49 22 uF 1 C52 0 01 uF 1 C55 6 8 uF 1 D1 12V 1 D2 IN5818 1 D3 IN5817 3 D4 D5 U20 IN914 2 JP5 JP1 JP9 HEADER 12 2 JP3 JP2 2 W 2 4 JP10 HEADER 2 1 JP7 HEADER 5 1 JP8 3 W 1 L1 4 7 uH 1 L2 I0 uH Table 1 4 Bill of Materials Item Quantity Reference Part Description 2b o T Boo 22UHM 26 2 L4 L5 47 uH 27 1 P1 DIGITIZER 28 1 P2 PCMCIA 29 2 Q2 Q1 BSS84ZXCT ND 30
12. s e Bus Cycle Generator which controls all timing e Bus Interface Unit controlling external ISA bus and internal address and data path handling Figure 1 5 VG330 Block Diagram System Clocks Power Management Unit Interrupt Controller Unit Memory Controller Real Time Clock Counter Timer Bus Cycle Generator Bus Interface MC 9 0 23 0 ISA Bus D15 0 Controller Keyboard Control LCD PC Card Purpose I O Unit Controller Controller 1 8 2 2 Memory The Cobra demonstration unit contains 2 Mbytes of DRAM shown on sheet 4 of the schematic The DRAM addressing conforms to the Memory Controller Pin Functions table in Chapter 6 Memory Controller Unit of the VG330 Data Manual DRAM Memory Memory control lines MC6 and MC7 control LCAS and UCAS while MC8 and 9 control OE and WE The bank selection is done by which is connected to the RAS pin of the DRAM FLASH ROM Memory The ROM memory in the demo unit consists of two 1Mx16 FLASH ROMs for total of 4 Mbytes SMRD is used to control OE for both ROMs The two are addressed by setting either ROMEN active or ROMCE 1 active Design ers may choose to use other ROM sizes A design may use only one ROM bank accessed by ROMEN if required in which case ROMCE1 would go unused 1 8 2 3 PCMCIA Cobra ha
13. s easy application development for the OEM consumer The standard software devel opment tools allow you to compile assemble link locate and debug using DOS You can link into the libraries provided by Vadem form an executable file for the VG330 and put the image into ROM A version of the kernel can run on top of DOS so while you are prototyping you can develop all the applications for DOS and prototype with them After you have finished debugging you can use the same API that you use on the kernel then use the new kernel libraries that do not have DOS function calls to eliminate the over head associated with DOS System Architecture 1 3 1 4 Design Objectives 1 5 Block Diagram Cobra was developed with two specific objectives Provide OEM developers with full schematics and documentation for a working design Show that a working device can be built using 2 AA batteries in a most compact design with a low bill of materials costs Cobra can be used as a baseline development architecture for a system running the an operating system that allows hardware management as well as connection to an internet mediation server Cobra highlights the power size and integration capabilities of Vadem s low cost sin gle chip processors and demonstrates how easy it is to build a light weight portable pen based personal information manager using Vadem technology Cobra combines the state of the art technologies of Vadem s VG330
14. s one card slot that complies with PC Card 2 10 JEIDA 4 1 standards This is shown on sheet 5 of the schematic Hardware Description 1 9 1 8 2 4 Infrared Communication IrDA For purposes of illustration Cobra includes components to show how infrared commu nication can be easily included in a design but software drivers are not included at this time with the hardware Cobra uses Temic s TFDS3000 Infrared IrDA Integrated Transceiver Circuit which is connected to the VG330 s serial port IR RXD and IR TXD signals The IR RXD and IR TXD signals are two of the VG330 s GPIO General Purpose Input Output pins Temic s TFDS3000 IrDA Integrated Transceiver connects to the VG330 and contains an integrated photo diode and LED The transceiver RXD output is inverted before being sent to the VG330 as IR RXD and the VG330 IR TXD signal is fed through a tri state buffer before being sent to the transceiver as TXD The TFDS3000 transmits and receives the pulse shaped bit stream and can be shut down for power manage ment under control of the VG330 IRDA EN signal The IrDA standard allows data rates from 2 4kBaud up to 115kBaud 1 8 2 5 A D Converter Cobra uses Maxim s MAX148 a 10 bit serial Analog to Digital Converter with an inter nal Track Hold and a sampling rate of 133KHz The converter is shown on sheet 7 of the schematic and shown in Figure 1 6 The device can be used in 8 channel single ended mode or 4 channel differential
15. signs can help you quickly bring to market low power highly integrated competi tive products Vadem can provide you with the tools needed to enter a market fast Cobra is only one example of many different solutions applications and operating systems which can be built on Vadem s single chip platforms Introduction 1 1 1 2 Features Cobra has the following features Vadem VG330 single chip PC platform A total of 2 MByte of DRAM consisting of a single 1M x 16 DRAM 4 MBytes of FLASH EPROM consisting of two 1M x 16 FLASH devices Power Supply Unit LCD display Digitizer touch panel using 10 bit serial A D converter VG330 Firmware BIOS Graphical OS Software amp Applications PC Card Slot Enclosure and hardware Infra red communications transceiver 1 3 System Architecture Vadem s approach for Cobra was to develop a small handheld client device to pro vide email web browsing and general interconnectivity with few device resources Cobra contains bundled firmware and application software allowing a plug n play solution for internet and world wide web access The application software consists of HTML 2 0 compatible Web Browser Email Usenet You can customize Cobra with an API for lower level firmware and use standard development tools based on DOS to develop your own applications This toolkit approach of a well documented API plus standard DOS development tools allow
16. single chip com puter with a PC Card and a Graphical User Interface GUI with pen input It shows how easy it can be to create a PDA Personal Digital Assistant a PIM Personal Infor mation Manager a PDT Portable Data Terminal or a general purpose Electronic Organizer The system demonstrates that a design can achieve powerful functionality while retaining the low cost and low power requirements for hand held devices Cobra uses a pen input graphical user interface GUI based operating system together with Vadem firmware The system runs applications such as a web browser graphical e mail and usenet Vadem s objective for this design is to demonstrate the ability to build a light weight cost effective personal information manager running on two AA batteries Vadem s patented power management technology and system level integration are among the critical factors that contribute to the design s success Cobra is provided with a generic case however 5 are free to choose their own case design There are few ICs required on the board because most of the system level components are already integrated into Vadem s VG330 As a result the design achieves reduced power consumption and compact size Cobra demonstrates Vadem s ability to design a product with increased levels of func tionality while maintaining the low cost and low power consumption requirements for hand held devices Figure 1 1 is a high level Cobra block diagram
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