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Connector pinout: Industrial PCI (IPCI) PCI=Peripheral Component Interconnect. IndustrialPCI is a version of PCI adapted for industrial and/or embedded applications. The IPCI connector has three parts: * Optional 60 pin PCI 64 bit extension (Top) * Mandatory 120 pin PCI 32 bit (Middle) * Optional 60 pin Custom I/O (Bottom) Since CompactPCI is based on PCI you should first refer to the PCI standard. This only explains the extensions CompactPCI specifies. pin name direction description color A1 +3,3V +3.3 VDC A2 AD2 Address 2 A3 AD6 Address 6 A4 GND Ground A5 AD10 Address 10 A6 AD13 Address 13 A7 GND Ground A8 SDONE Snoop Done A9 GND Ground A10 FRAME# Indicate Address or Data phase A11 AD18 Address 18 A12 GND Ground A13 +5V +5 VDC A14 AD24 Address 24 A15 AD27 Address 27 A16 GND Ground A17 REQ2 Request 2 A18 GND Ground A19 CLK1 33 or 66 MHz Clock A20 CLK2 A21 GND Ground A22 CLK3 A23 CLK4 A24 +3,3V +3.3 VDC B1 REQ64# Request 64 ??? B2 AD3 Address 3 B3 +5V +5 VDC B4 AD8 Address 8 B5 +3,3V +3.3 VDC B6 AD14 Address 14 B7 PAR Parity B8 +3,3V +3.3 VDC B9 STOP# Stop B10 C/BE2# Command, Byte Enable 2 B11 V(I/O) +3.3 or +5 VDC B12 AD21 Address 21 B13 +3,3V +3.3 VDC B14 V(I/O) +3.3 or +5 VDC B15 AD28 Address 28 B16 AD31 Address 31 B17 +3,3V +3.3 VDC B18 GNT3 Grant 3 B19 RST# Reset B20 NMI# Non Maskable Interrupt B21 X6 Reserved (6) B22 +5V +5 VDC B23 RSTIN# B24 USB+ Universal Serial Bus (USB)(+) C1 ACK64# Acknowledge 64 ??? C2 GND Ground C3 AD7 Address 7 C4 AD9 Address 9 C5 AD11 Address 11 C6 GND Ground C7 SERR# System Error C8 PERR# Parity Error C9 DEVSEL# Device Select C10 GND Ground C11 AD19 Address 19 C12 AD22 Address 22 C13 GND Ground C14 AD25 Address 25 C15 GND Ground C16 X1 Reserved (1) C17 GNT2 Grant 2 C18 REQ4 Request 4 C19 SLEEP#/SDAT Sleep/Serial Data (I2C) C20 X4 Reserved (4) C21 INTD# Interrupt D C22 INTB# Interrupt B C23 +5V +5 VDC C24 USB- Universal Serial Bus (USB)(-) D1 AD0 Address 0 D2 AD4 Address 4 D3 C/BE0# Command, Byte Enable 0 D4 +3,3V +3.3 VDC D5 AD12 Address 12 D6 AD15 Address 15 D7 V(I/O) +3.3 or +5 VDC D8 LOCK# Resource Lock D9 TRDY# Test Logic Ready D10 AD16 Address 16 D11 AD20 Address 20 D12 +5V +5 VDC D13 +5V +5 VDC D14 AD26 Address 26 D15 AD29 Address 29 D16 REQ1 Request 1 D17 REQ3 Request 3 D18 V(I/O) +3.3 or +5 VDC D19 X2 Reserved (2) D20 X5 Reserved (5) D21 +3,3V +3.3 VDC D22 INTA# Interrupt A D23 ICPEN#/SCLK ICPEN/Serial Clock (I2C) D24 OSC (PWDN) E1 AD1 Address 1 E2 AD5 Address 5 E3 GND Ground E4 M66EN Enable 66Mhz PCI-bus E5 GND Ground E6 C/BE1# Command, Byte Enable 1 E7 SBO# Snoop Backoff E8 +5V +5 VDC E9 IRDY# Initiator Ready E10 AD17 Address 17 E11 GND Ground E12 AD23 Address 23 E13 C/BE3# Command, Byte Enable 3 E14 GND Ground E15 AD30 Address 30 E16 GNT1 Grant 1 E17 +5V +5 VDC E18 GNT4 Grant 4 E19 X3 Reserved (3) E20 GND Ground E21 INTC# Interrupt C E22 -12V -12 VDC E23 +12V +12 VDC E24 VBATT