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Last update: 4 March 2005

IC number:8242, 8742
IC function:8-bit slave microcontroller, UPI (Universal Peripheral Interface)

Component documentation
IC numberManufacturerDocumentation
8242IntelNot available
8742IntelDatasheet (PDF)

Device versions
IC numberPackageROM type
P824240-pin Plastic DIPPre-programmed
D874240-pin Ceramic DIPOTP
P874240-pin Plastic DIPOTP

Programmed components
IC numberCBM part numberCBM part descriptionChecksum
380680-011F4B
8742390341-01IC, 8742, Microcntrl EPROM
8242390341-018242 Keybrd control
8242390580-01P8242 Intel Microcontroller
8742391171-0137BB

Positions
DevicePositionComponentPackage
A2286 sandwich boardU72380680-01 (1F4B)DIP
A2386U601391171-01 (37BB)DIP
PC30-III board rev. 1U203390580-01 / 390341-01DIP
PC30-III board rev. 8U203390580-01 / 390341-01DIP
PC40-IIIU203390341-01DIP
PC60-IIIU77390580-01DIP
T486U156390580-01DIP

Pinout
PinTypeNameSignal name
A2286 sandwich boardPC30-III, PC40-IIIPC60-III
1InputTEST0KBCLKconnected to pin 3 of CN201 indirectlyKBDCLK
2InputXTAL1PCLKGND8042CLK
3InputXTAL2PCLK7.159M8042CLK*
4InputRESET_RESET_NRESET'RESET4*
5InputSS_+5VVCC
6InputCS_GND8042CS*
7InputEAGND
8InputRD_8042RD_N8042RD'XIOR*
9InputA0SYSA(2)BADDR(2)XA(2)
10InputWR_8042WR_N8042WR'XIOW*
11OutputSYNCunused
12..19I/OD0..D7EDATA(0)..EDATA(7)XD(0)..XD(7)
20PowerVSSGND
21I/OP20SETSD_NSETSD'RESET2*
22I/OP21A20GTGATEA20
23I/OP22unused
24I/OP23unused
25I/OPROG+5VVCC
26PowerVDD+5VVCC
27I/OP10+5V via RN10unusedSW3
28I/OP11+5V via RN10unusedSW4
29I/OP12+5V via RN10unusedSW5
30I/OP13GNDSW0
31I/OP14unusedSW6
32I/OP15+5V via RN10SW1
33I/OP16connected to J14SW2
34I/OP17+5V via RN10connected to CN202 via FB207KBDINH
35I/OP24/OBFKBDINTIRQ(1)
36I/OP25/IBF_unused
37I/OP26/DRQP26connected to pin 3 of CN201 indirectlyKBCLK*
38I/OP27/DACK_P27connected to pin 2 of CN201 indirectlyKBDATA
39InputTEST1KBDATAconnected to pin 2 of CN201 indirectlyKBDDATA
40PowerVCC+5VVCC

Copyright © 2003-2005 Ronald van Dijk - All rights reserved