Pc/104 Bus; Connectors - Kontron PC/104-PCMCIA-1 User Manual

PC/104 BUS

7.
The design of the PC/104-PCMCIA-1 follows the standard PC/104 format.
The PC/104 bus consists of two connectors that use 104 pins in total.
XT bus connector (64 pins)
AT bus connector (40 pins, which is optional for 16-bit, data-bus system)
The pinout of the PC/104 bus connectors corresponds to the pinout of the ISA bus
connectors with some added ground pins. The two PC systems with different form factors
are electrically compatible.
XT Bus Connector, Row A and B
The corresponding 64-pin stackthrough header (ISA bus = 62pins) has two added ground
pins at the end of the connector (Pin A32 and Pin B32). The pinout between PC/104 bus
and XT ISA bus is identical between A1 - A31 and B1 - B31.
AT Bus Extension Connector, Row C and D
The corresponding 40-pin stackthrough header (ISA bus = 36 pins) has four added ground
pins, two on each side of the connector. To avoid confusion, the first two pins are defined
as Pin C0 and Pin D0. The additional ground pins at the end of the connector are defined as
C19 and D19. On many boards, Pin C19 is defined as the "key" pin. The pinout between the
PC/104 bus and AT ISA bus is identical between C1 - C18 and D1 - D18.
The PC/104-PCMCIA-1 features both – XT bus and AT bus extension – on two, dual-row
socket connector with 2.54mm x 2.54mm grid (0.1" x 0.1").

Connectors

7.1
The PC-104 bus is available through the J1/P1 and J2/P2 connectors.
A detailed description of the signals, including electrical characteristics and timings, is
beyond the scope of this document. Please refer to the official ISA bus and PC/104
specifications for more details.
PC/104 Bus 12
Kontron
PC/104-PCMCIA-1 User's Guide