Amstrad PenPad PDA 600 -- Chips
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Chips on the PCB

missing numbers are unused

Numberfront/backInscriptionDescription
U1FZ8S180CPU, Zilog
U2F42069OS-ROM, probably 27c1001, 128K*8, Amstrad
U3FKM681000ALT-8LRAM, 128K*8, static, Hyundai/Samsung
U4FHD64610FPRTC, Hitachi
U5F41857???, Amstrad
U6FHC157AQuad Channel 2 Multiplexer, Motorola
U7BHC157AQuad Channel 2 Multiplexer, Motorola
U8BHC157AQuad Channel 2 Multiplexer, Motorola
U9FHC157AQuad Channel 2 Multiplexer, Motorola
U10BHC245AOctal Bus Transceiver, Motorola
U11BKM62256BLG-10LRAM 32K*8, Samsung
U12FHD64646LCD-Controller, Hitachi
U16BHC00AQuad Dual-Input-Nand, Motorola
U20B14052BAnalog Multiplexer
U21FMAX7315V Step Up Converter, Maxim
U22B7673/CBA/L327???, 8 Pin
U23BHC00AQuad Dual-Input-Nand, Motorola
U24F41864???, Amstrad
U25FMAX6415V Step Up Converter, Regulator, Maxim
U26Bnot readable???, 14 pin
U27FLP324MQuad OA
U28BMC145053DAD-Converter, Motorola
U30FMAX222RS232 Driver/Receiver, Maxim
U31F41863???, Amstrad
U32FHC574Octal D-Flip-Flop, TI
U33FKM62256BLG-10LRAM 32K*8, Samsung
U35FTCM5089Tone Dialer
U36Fnot readable
(25N 318T 061AC?)
???, 8 Pin, TI
U37FHC20Dual Quad-Input Nand, Motorola
U41BHC541Octal Bus Buffer, TI
U42BHC541Octal Bus Buffer, TI
U43FHC541Octal Bus Buffer, TI

U1: CPU

Z8S180
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U2: ROM


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U3: RAM

128K RAM, static
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U4: RTC

nearly no data found
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U5: Amstrad ASIC

unknown functionality
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U6, U7, U8, U9: Multiplexer

quad channel dual multiplexer
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U11: RAM

32K RAM, static
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U12: LCD Controller

nearly no data found
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U21: 5V StepUp converter

voltage converter
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U21: 5V StepUp converter

voltage converter
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U27: OA

quad operational amplifier
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U30: RS232 Driver

Driver for serial interface
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U31: Amstrad ASIC

unknown functionality
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U32: FlipFlop

Octal D-Flip-Flop
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U33: RAM

32K RAM, static
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U35: Tone Dialer

generates DTMF frequencies
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U36: unknown

unknown functionality
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U37: Nand

Dual Quad-Input Nand
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U43: Bus Buffer

Octal Bus Buffer
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Connectors


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© 2003 Thomas Müller
Last Update: August 18th, 2003