A Surgical Guide To The Amstrad Notepad Computer ------------------------------------------------ Amstrad Notepad Computer - What is it ? --------------------------------------- The model NC100 is about DIN A4 size with a LCD 8 lines * 80 characters screen, nearly full size keyboard, a PCMCIA memory card slot on the right hand side and four coloured keys. The Notepads have standard Centronics parallel port (DB-25 pin famale connector) and RS232 (DB 9 pin male) serial port. The system has drivers for 9 and 24 pin dot matrix, Canon inkjet and Laserjet printers. The serial connector support 300, 1200, 2400, 4800, or 9600 bps. As power supply the NC100 use 4 * AA sice batteries or an AC adapter. As backup battery ther is also a CR2032 3 Volt lithium cell. The model NC150 (it seems) is retailing only in Italy and Fance. It has 512K bytes firmware ROM and 128K RAM. The extra 256K bytes ROM contains a spreadsheet and the arcade game 'BLOCKADE' (similar to TETRIS). The model NC200 include the additional features of the NC150 but also a 720K MS-DOS compatible 3.5 inch floppy disk drive and a 16 lines by 80 characters screen witch had to be fold up like a laptop. 浜様様様様様様様様様様様様様様様様様様様様様融 敖卍朕 敖陳陳陳陳陳陳陳陳 様様 敖 Amstrad \ 様様 青 陳陳陳陳陳陳陳陳陳 敖陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳朕 膿 些 些 青陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳潰 些 青陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳潰 些 肺/ 麺用様冤用様冤用様冤用様冤用様冤用様冤用様冤郵 膿 St1 2 3 4 5 6 7 8 9 0 DeBs 些 把珍堕疎珍堕疎珍堕疎珍堕疎珍堕疎珍堕疎珍堕祖超 粘 TabQ W E R T U I O P 些 把陳疎珍堕疎珍堕疎珍堕疎珍堕疎珍堕疎珍堕楚< 粘 v A S D F G H J K L 些 把陳珍賃祖汰賃祖汰賃祖汰賃祖汰賃祖汰賃祖珍堕超 粘 ^ X C V B N M , . ^ 些 把陳陳汰賃祖汰陳祖珍陳祖珍陳祖汰賃祖汰賃陳田超 粘 y r g b 些 藩様様詫溶様詫様様様様様様様様詫溶様詫溶様詫夕 青俎 -1- Specifications -------------- Model : NC100 Processor : Z80 compatible CMOS Operating frequency : 6 MHz Memory : 64K byte internal (15K system-, 11K upper-, 38K lower memory) Storage : PCMCIA/JEIDA Memory Cards (PC-Cards) Type I max. 1M byte SRAM 5 Volt Display : 480*32 pixel disply (usually 80*8 characters) Weight : 930 g Height : 22 mm Width : 295 mm Length : 210 mm Power Consumption ON : 40 - 60 mA Built in firmware : 256K byte with - Texteditor with mailmerge and spellchecker - Address book - Time manager (diary with alarm-clock) - Calculator - Terminal-programm (serial Tranfer with ASCII or XModem) - BBC-BASIC with Assembler support How to get the Firmware Number ? -------------------------------- Wenn you are in the main Menu (text editor, calculater, calender) push the secret-button and the system-settings menu appears, the version number will be shown in the first line of the sceen. I have a german NC100 and the firmware number is v1.06. PCMCIA Memory Cards ------------------- A battery buffered PCMCIA SRAM-Memory Card will preserve you from data loss even if your Notepad crashes and increases the available memory. It also allows you to create a file with BBC-BASIC bigger than 1024 bytes. This is because BBC-BASIC allocates all available memory on startup except 1024 bytes. The maxinun sice to use with the NC100 is up to 1M byte. -2- How to open the NC100 ? ----------------------- Before disassembling the Notepad you should save all your data! Then put the Notepad on the table face down. Remove the four AA size batteries, then unscrew the five screws (one under the battery cover). In the drawing below they are marked with a "*"-sign. One screw fixes the cover of the firmware EPROM.Place the Notepad the right way up and lift off the upper part of the case. Be careful, because the display is still connected to the main-board via a folio-flat-cable and so is the speaker! Don't be nervous, the cables can be simply pulled out of their sockets. Now you can separate the covers. 敖陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳朕 Firmware EPROM (IC303) cover * 敖陳陳陳陳陳朕 * 敖朕 * 敖朕 攸陳楚 青陳陳陳陳陳潰攸陳楚 青陳潰 Open battery 青陳潰 楽陳陳陳陳陳陳朕cover Lithium 崖 + battery敖陳朕 鈎陳*陳陳陳陳調 cover 崖 - * 請陳陳陳陳陳陳珍陳陳陳陳陳陳陳陳珍陳陳祖陳陳潰 -3- What is inside? --------------- Inside the NC100 is a SMD layout. I have a german NC100 and the plate is labeled Amstrad plc 4500-001P-1, NA999-32142, manual marked C (A-H) and 1 (1-8). All IC's are SMD apart from IC303 which is on the backside of the NC100 (behind the firmware EPROM cover). On the drawing below I have labeled all IC's, but you can find it on the layout also! Centronics RS232 6VDC 浜様様様様様様用様冤様様様冤用様用様様様様用兒 4 * AA size - 青陳陳陳 青陳 碩 Batteries 敖陳陳笥陳 敖朕309 敖311 + 垣陳 青潰 団 麺様様様様様用余 302 308敖朕305 敖神潰313 青津堕朕青314 PCMCIA 301 青陳陳 請陳 敖 card-slot 敖 307 310敖陳陳朕304 青312 青 敖笥朕303 把陳陳陳堕陳潰 青拈潰青陳陳潰 麺用様冤湾様冤用様冤用様冤用様冤用様冤用様冤郵 St1 2 3 4 5 6 7 8 9 0 DeBs 把珍堕疎珍堕疎珍堕疎珍堕疎珍堕疎珍堕疎珍堕祖超 TabQ W E R T U I O P + 把陳疎珍堕疎珍堕疎珍堕疎珍堕疎珍堕疎珍堕楚< v A S D F G H J K L 把陳珍賃祖汰賃祖汰賃祖汰賃祖汰賃祖汰賃祖珍堕超 ^ X C V B N M , . ^ 把陳陳汰賃祖汰陳祖珍陳祖珍陳祖汰賃祖汰賃陳田超 y r g b 藩様様詫溶様詫様様様様様様様様詫溶様詫溶様詫夕 -4- The tabel below gives a description of the IC's in the NC100: 浜様用様様様様様様様用様様様様冤様様様様様様様様様様様様様様様様様様様 IC-#Label Pin's Description 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 301 ZILOG 4*11= 44Z84C00 Z84C0006FEC PLCC 44 CMOS, 6 MHz Z80 CPU Z80 compatible Microprocessor 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 302 NEC Japan 4*34=136恰PD 65034 D65034GD093 PLCC 136Customer Chip 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 303 NEC Japan 2*16= 3227C2001 = CMOS EPROM 256K*8 bit D27C2001 DIL 32 Firmware EPROM 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 304 NEC JAPAN 2*14= 28恰PD 43257 A = CMOS SRAM 32K*8 bit D43257AGU-10LL SO 28 Memory layouted as an SO 32 (32 pin)! 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 305 NEC Japan 2*14= 28恰PD 43257 A = CMOS SRAM 32K*8 bit D43257AGU-10LL SO 28 Memory 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 306 MEMORY CARD 2*34= 68PCMCIA/JEIDA Memory Cards Slot Type I PCMCIA for max. 1M byte SRAM Memory, 5 Volt 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 307 T 9224 HB 2*10= 20TC8521 8521 AM SO 20 Real-Time-Clock 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 308 NEC Japan 2*14= 28恰PD 71051 D71051 GU SO 28 UART (parallel to seriell transpose) 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 309 NEC Japan 2*10= 20恰PD 4711 D4711 AG SO 20 RS232-driver (shift level to +/- 10V) 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 310 not placed 2* 7= 1474HC00 = CMOS-Logic 4 * NAND SO 14 (only used if IC304/IC305 = 43256) 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 311 D4584G 2* 7= 144584 = CMOS-Logic 6 * Schmitt-Trigger SO 14 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 312 C339 G 2* 7= 14LM339 = 4 * Comparator SO 14 (used for battery level detection) 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 313 D4013G 2* 7= 144013 = CMOS-Logic 2 * D-Flip Flop SO 14 with set and reset 把陳津陳陳陳陳陳陳陳津陳陳陳陳田陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳 314 D4584G 2* 7= 144584 = CMOS-Logic 6 * Schmitt-Trigger SO 14 藩様溶様様様様様様様溶様様様様詫様様様様様様様様様様様様様様様様様様様 -5- Amstrad NC100/NC150 Simplfied Bock Diagram ------------------------------------------ 浜様様様様様様様様様様様様様様曜様様様様様様邑 Addressbus 浜様様様様様様様様様様曜様様様様様様融 Databus A0 敖陳陳陳陳朕 敖槻陳陳伉朕 敖槻陳陳祖朕 敖陳陳朕 敖陳陳陳朕 麺裕D0-7 D0-7 A0-15 D0-7 C/D IC301 突様様 IC302 突裕 IC308 突裕IC309 突 CN302 ___ __ D-SUB9 麺雄様A0-15 CS4団調CS Serial 青陳陳陳潰 CPU CLK団陳陳CLK UCLK団調CLK 青陳陳陳陳潰 敖陳陳陳陳朕 UART 麺裕D0-7 青陳陳陳陳潰 IC303 __ ___ ____ ____ CE団陳陳CS0 STBY団陳陳陳陳陳陳陳調STBY 麺雄様A0-13 RS232 敖陳陳陳朕 A14-17(19)突曜様AO14-19 青陳陳潰 EPROM ____ ___ CN301 青陳陳陳陳潰 STRB,ACK,突様様様様様様様様様様様様D-SUB25 敖陳陳陳陳朕 BUSY, Paralell 麺裕D0-7 PD0-7 青陳陳陳潰 IC304 敖陳陳陳朕 敖陳陳陳陳陳陳陳陳陳朕 麺雄様A0-13 A14団超 突裕 CN303 突 __ ___ 14 Pins RAM CS団頂陳CS1 青陳陳陳陳潰 青陳陳陳潰 LCD-Screen 敖陳陳陳陳朕 敖陳陳陳朕 青陳陳陳陳陳陳陳陳陳潰 麺裕D0-7 IC305 KBO0-9突裕 CN304 突様様様様様 10 Pins 麺雄様A0-13 A14団超 敖陳陳陳陳伉陳陳陳陳朕 __ ___ 青陳陳陳潰 RAM CS団頂陳CS2 敖陳陳陳朕 青陳陳陳陳潰 敖陳陳陳陳朕 KBI0-7突裕 CN305 突 A14-19突夕 9 Pins Keybord Matrix IC306 青陳陳陳陳陳陳陳陳陳潰 BVD1/2団陳陳BVD1 青陳陳陳潰 麺雄様A0-13 敖陳陳陳朕 D0-7突様様MD0-7 敖諏 PCMCIA SP団陳陳 CN307 団陳陳陳 額 青陳陳陳陳潰 敖調 2 Pins 団陳陳陳 額 敖陳陳陳陳朕 POFF 青掏 藩裕D0-3 青陳陳陳潰 IC307 烝 Speaker __ ___ 敖陳陳陳陳陳陳陳陳 敖陳陳陳朕 藩様様A0-3 CS団陳陳CS3 POFF団陳陳OFF _____ BD1, BD2,突様様Level Detector 団 CN306 RTC ALARM団陳 BVD2 __ 団 青堕陳陳堕潰 青堕陳陳堕潰 敖調ON 団6VDC-IN Power Supply 青陳陳陳潰 青館団 青館団 青陳陳陳陳陳陳陳陳 X302 32.768K X301 12.2M 青陳陳陳陳陳陳陳 -6- Amstrad NC100/150 Power Supply Bock Diagram ------------------------------------------- 敖陳陳 敖陳陳陳陳陳陳陳陳 DC6V 畋o陳陳陳陳陳津陳陳津陳調 団陳陳o +6V 攷 垣o陳陳陳 + 青陳陳 DC/DC-Converter 崖碩 陳珍陳 F301 団陳陳o +5V 請陳陳o朕 敖陳 青堕 敖陳陳調 団陳陳o 5VBK AC-Adaptor 陳珍陳 and Lith. buff. RAM Input 敖陳 団陳陳o -15V 青堕 + for LCD-Display 陳珍陳 陳珍陳 敖陳 敖陳 団陳陳o BD1, IC302 青堕 青堕 Battery Level 4*AA<4.2V 陳珍陳 - Detector 団陳陳o BD2, IC302 敖陳4*AA Lith. Lith.<2.3V 青堕 団陳陳o BVD2,IC302 - 4*AA<3.2V 青陳o陳陳陳o陳陳陳 ON/OFF 団陳陳 青陳陳陳賃陳陳陳陳 烝 烝 +6V o 青陳陳陳陳 攸 IC313A 敖陳陳陳陳 S301 逝 S Q 団陳 珍 敖陳o o陳陳o陳陳o陳陳陳陳陳陳o 烝 敖陳陳陳陳 R _____ IC307, ALARM o陳陳 青陳陳陳陳 ___ IC301, NMI o陳陳陳陳潰 IC302, POFF o陳陳陳陳陳陳陳 -7- On the next pages folowing the pinouts off the most important IC's used in the NC100. '*' indicates active Low and 'NC' is Not Connected in the NC100 The Microprocessor (MPU, IC301) ------------------ Type : Z84C00 Manufacturer : Zilog Inc. Description : Microprocessor, 8-Bit Power Consumption : 15 mA typ. at 6 MHz Process : CMOS Supply Voltage : +5V Operating frequency max. : 6 MHz Package : PLCC 44 pin Features : - Commands compatible with Zilog Z80 MPU - Powerful set of 158 instructions including the 78 of the 8080A - 10 addressing modes - Power down mode when the system clock is stopped Pinout : 1 A11 23 *RD 2 A12 24 NC 3 A13 25 NC 4 A14 26 *WR 5 A15 27 *BUSACK 6 NC 28 *WAIT 7 CLK 29 *BUSREQ 8 D4 30 *RESET 9 D3 31 *M1 10 D5 32 *RFSH 11 D6 33 GND 12 NC 34 A0 13 VCC 35 A1 14 D2 36 A2 15 D7 37 A3 16 D0 38 A4 17 D1 39 A5 18 *INT 40 A6 19 *NMI 41 A7 20 *HALT 42 A8 21 *MREQ 43 A9 22 *IORQ 44 A10 -8- The Customer Chip (IC302) ----------------- Type : PD 65034 Manufacturer : NEC Electronics Description : Customer Chip with multiple funktions Process : CMOS Supply Voltage : +5V Package : PLCC 136 The chip has multiple funktions: - Clock generator for CPU and UART - Peripher Interface Adaptor (to printer, LCD-screen, keybord,) - Memory Management Unit - PCMCIA-Interface - Sound generator for speaker Pinout : 1 VDD 35 GND 69 VDD 103 GND 2 KBI1 36 GND 70 TEMP 104 GND 3 KBI5 37 AO18 71 UCLK 105 *STRB 4 KBI7 38 AO19 72 RRDY 106 *CD2 5 KBI6 39 GND 73 TRDY 107 *CD1 6 KBI4 40 CLK 74 *STBY 108 *CE1 7 KBI3 41 HALT 75 LD0 109 *OE1 8 KBI2 42 *MREQ 76 LD1 110 *WE1 9 KBI0 43 *IORQ 77 LD2 111 *REG 10 A0 44 *BACK 78 LD3 112 BVD2 11 A1 45 *BREQ 79 FRM 113 BVD1 12 A2 46 *WAT 80 DF 114 WP 13 A3 47 *M1 81 LOAD 115 MD3 14 A4 48 *INT 82 CP 116 MD4 15 A5 49 *RD 83 POFF 117 MD5 16 A6 50 *WR 84 SP 118 GND 17 GND 51 DO 85 GND 119 MD6 18 GND 52 D1 86 GND 120 MD7 19 A7 53 D2 87 BD1 121 MD0 20 A8 54 D3 88 BD2 122 MD1 21 A9 55 GND 89 *NMIC 123 MD2 22 A10 56 D4 90 *RES 124 TEST (NC) 23 A11 57 D5 91 URES 125 KBO9 24 A12 58 D6 92 *BUSY 126 KBO8 25 A13 59 D7 93 *ACK 127 KBO7 26 A14 60 RRD 94 PD7 128 KBO6 27 A15 61 *CS0 95 PD6 129 KBO1 28 AO14 62 *CS1 96 PD5 130 KBO2 29 AO15 63 *CS2 97 PD4 131 KBO5 30 AO16 64 *CS3 98 PD3 132 KBO4 31 AO17 65 *CS4 99 PD2 133 KBO3 32 X2 66 TRXC 100 PD1 134 KBO0 33 X1 67 GND 101 PD0 135 GND 34 VDD 68 GND 102 VDD 136 GND -9- The Firmware EPROM (IC303) ------------------ Type : PD 27C2001 Manufacturer : NEC Electronics Description : EPROM, 2Mb, 8-Bit, UV-eraseable Org. : 256K x 8 Bit Process : CMOS Supply Voltage : +5V Standby : 0.5 mW Operation : 150 mW Package : DIL Pinout : 1 NC (A19) 17 O3 2 A16 18 O4 3 A15 19 O5 4 A12 20 O6 5 A7 21 O7 6 A6 22 *CE 7 A5 23 A10 8 A4 24 *OE 9 A3 25 A11 10 A2 26 A9 11 A1 27 A8 12 A0 28 A13 13 O0 29 A14 14 O1 30 A17 15 O2 31 NC (A18) 16 GND 32 VCC The NC100 can also control 27C4001 (512K), 23C2001 (256K), 23C4001 (512K), 23C8001 (1M byte) EPROM's! By the type of the EPROM there had to be set some different connections, this connections are set by zerro Ohm MSD-resistors from the backside of the plate close to IC303: 浜様様様様冤様様様用様様様冤様様用様様様冤様様融 IC303 Kbyte J301 J302 J303 J304 麺様様様様慷様様様謡様様様慷様様謡様様様慷様様郵 27C2001 256 + + 把陳陳陳陳田陳陳陳津陳陳陳田陳陳津陳陳陳田陳陳超 27C4001 512 + + 麺様様様様慷様様様謡様様様慷様様謡様様様慷様様郵 23C2001 256 + + 把陳陳陳陳田陳陳陳津陳陳陳田陳陳津陳陳陳田陳陳超 23C4001 512 + + 把陳陳陳陳田陳陳陳津陳陳陳田陳陳津陳陳陳田陳陳超 23C8001 1024 + + 藩様様様様詫様様様溶様様様詫様様溶様様様詫様様夕 + = use I have double my ROM-space by set in a 27C4001 EPROM, remove J304 and set in J301 by a pice of wire. -10- The Static Random Access Memory (SRAM, IC304 and IC305) ------------------------------- Type : PD 43257A Manufacturer : NEC Electronics Description : SRAM, 256K Bit Org. : 32K x 8 Bit Process : CMOS Supply Voltage : +5VBK (Lithium battery buffered) Standby : 0.5 mW Operation : 225 mW Package : SO 28 Pinout : 1 A14 15 DQ4 2 A12 16 DQ5 3 A7 17 DQ6 4 A6 18 DQ7 5 A5 19 DQ8 6 A4 20 *CS 7 A3 21 A10 8 A2 22 *OE 9 A1 23 A11 10 A0 24 A9 11 DQ1 25 A8 12 DQ2 26 A13 13 DQ3 27 *WE 14 GND 28 VCC On my NC100 the IC304 is layouted as an SO 32 (32 pin). I belief you can put some bigger RAM-chip in the circuit, but there is nothing about that in the electronic diagram! There is only that the NC100 can control a 43256 RAM-chips. By the type of the RAM-chip there had to be set some different connections and use IC310: 浜様様様様様冤様様用様様様冤様様用様様様冤様様様 IC304, 305 J305 J306 J307 J308 IC310 麺様様様様様慷様様謡様様様慷様様謡様様様慷様様様 43256 + + 把陳陳陳陳陳田陳陳津陳陳陳田陳陳津陳陳陳田陳陳陳 43257 + + + 藩様様様様様詫様様溶様様様詫様様溶様様様詫様様様 + = use -11- The PCMCIA card slot (IC306) -------------------- The NC-100 can use PCMCIA/JEIDA Memory Cards (PC-Cards) Type I, max. 1024K (1M) byte static ram card, 5 Volts. You can bye them in 64Kb, 128Kb, 256Kb, 512Kb, and 1024Kb sizes. The flash memory cards are not suitable for the NC-100. These have a control register that must be written to before any read or write can take place. Data transfers are then be done in sector chunks. PCMCIA Card Connector Type I, 5 Volts: 1 mm 1 mm 崖 崖 崖 34 1 崖 敖陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳審陳陳陳陳陳陳 1.6 mm 陳沈 崖 3.4 mm 陳坪 誠陳 1 mm 青陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳陳潰陳陳陳陳陳陳 68 35 54 mm PCMCIA Version 2.0 Pinout: 1 GND 35 GND 2 D3 I/O 36 *CD1 O 3 D4 I/O 37 D11 I/O (NC) 4 D5 I/O 38 D12 I/O (NC) 5 D6 I/O 39 D13 I/O (NC) 6 D7 I/O 40 D14 I/O (NC) 7 *CE1 I 41 D15 I/O (NC) 8 A10 I 42 *CE2 I (NC) 9 *OE I 43 RFSH I (NC) 10 A11 I 44 RFU I (NC) 11 A9 I 45 RFU I (NC) 12 A8 I 46 A17 I 13 A13 I 47 A18 I 14 A14 I 48 A19 I 15 *WE/PGM I 49 A20 I (NC) 16 RDY/*BSY O 50 A21 I (NC) 17 VCC 51 VCC 18 VPP1 52 VPP2 19 A16 I 53 A22 I (NC) 20 A15 I 54 A23 I (NC) 21 A12 I 55 A24 I (NC) 22 A7 I 56 A25 I (NC) 23 A6 I 57 RFU (NC) 24 A5 I 58 RESET I (NC) 25 A4 I 59 *WAIT O (NC) 26 A3 I 60 RFU (NC) 27 A2 I 61 *REG I 28 A1 I 62 BVD2 O 29 A0 I 63 BVD1 O 30 D0 I/O 64 D8 I/O (NC) 31 D1 I/O 65 D9 I/O (NC) 32 D2 I/O 66 D10 I/O (NC) 33 WP O 67 *CD2 O 34 GND 68 GND RFU = Reserved Future Use -12- The Real-Time-Clock (RTC, IC307) ------------------- Type : TC8521AP/AM Manufacturer : Toshiba Corporation Description : Real Time Clock Process : CMOS Supply Voltage : +5VBK (Lithium battery buffered) Power Dissipat. max : 1.25 mW Package : SO 20 Features : - Clock funktion (hr, min, sec, date, day of week, year and leap year) auto-calendar - Clock system of 24-hour or 12-hour selectable - +/- 30 sec correction funktion - Alarm signal or pulse of 16Hz or 1Hz can be output - Built-in 26*4 bit RAM - 4-bit bidirectional data bus - 4-bit adress input - Directly connectable with CPU bus - Capable of battery backup Pinout : 1 *CS 2 CS 3 ADJ 4 A0 5 A1 6 A2 7 NC 8 A3 9 *RD 10 GND 11 *WR 12 D0 13 D1 14 D2 15 D3 16 *ALARM 17 NC 18 XIN 19 XOUT 20 VCC -13- The Universal Asynchronous Receiver Transmitter (UART, IC308) ----------------------------------------------- Type : PD 71051 Manufacturer : NEC Electronics Description : UART Serial Control Unit Process : CMOS Supply Voltage : +5V Package : SO 28 Features : - Synchronous and asynchronous operation - Full duplex, double buffered transmitter / receiver - Error detektion at parity, overrun and framing - 5 to 8 bit characters - Low power standby mode - Functionally equivalant to the 8251A UART Pinout : 1 D2 2 D3 3 RxDA TA 4 GND 5 D4 6 D5 7 D6 8 D7 9 *TxCLK 10 *WR 11 *CS 12 C/*D 13 *RD 14 RxRDY 15 TxRDY 16 SYNCBRK (NC) 17 *CTS 18 TxE MP 19 TxDA TA 20 CLK 21 RES ET 22 *DSR (NC) 23 *RTS 24 *DTR (NC) 25 *RxCLK 26 Vdd 27 D0 28 D1 -14- The RS232-Driver (IC309) ---------------- Type : PD 4711A Manufacturer : NEC Electronics Description : RS232-Driver Process : MOS-IC Supply Voltage : +5V Power Dissipat. : 60 mA Package : SO 20 The RS232-driver shift up the TTL-level (0V/+5V) output from UART to RS232-level (+10V/-10V). Pinout : 1 Vdd 2 C1+ 3 Vcc 4 C1- 5 STB 6 Din1 7 Din2 8 Rout 1 9 Rout 2 10 GND 11 Rcon 12 Rin2 13 Rin1 14 Dout 2 15 Dout1 16 Dcon 17 Vss 18 C4- 19 GND 20 C4+ The RS232-connector pinout (DTR just duplicates RTS): IC309 J310 朕 Pin I/O Description 敖o陳o陳陳朕 5 15団陳陳陳田陳陳陳陳笥田津o 5 GND Signal Ground 14団陳陳陳o陳陳陳陳審崖 o 9 < RI Ring Indicator (NC) 13団陳陳陳陳陳陳陳審崖青珍o 4 > DTR Data Terminal Ready 12団陳陳陳o陳陳陳津電田陳陳陳o 8 < CTS Clear To Send 崖静陳珍o 3 > TD Transmit Data 垣津陳陳陳o 7 > RTS Request To Send 青津陳珍o 2 < RD Receive Data 青o陳o陳陳田陳陳陳o 6 < DSR Data Set Ready (NC) J311 o 1 < CD Carrier Detect (NC) 1 o 潰 烝 烝 -15- Author: Hans-Jrgen Bhling Blowstr. 2 40476 Dsseldorf Germany e-mail : 101.107378@germanynet.de homepage: http://www.germany.net/teilnehmer/101.107378/index.htm -16-