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6. I/O CONNECTORS
6.1 Connector Pinout and Signal Description
6.1.1
PC/104 (J1, J2)
The Helix SBC includes the non-stack through / short pin 8-bit and 16-bit PC/104 connectors on the top side in
the standard position as described by the latest revision of the PC/104 specification.
Note: On the 64-pin connector J1, the leftmost pins are numbered 1. On the 40-pin connector J2, the leftmost pins
are numbered 0.
J2: PC/104 16-bit bus connector
D0
Ground
MEMCS16-
D1
IOCS16-
D2
IRQ10
D3
IRQ11
D4
IRQ12
D5
IRQ15
D6
IRQ14
D7
DACK0-
D8
DRQ0
D9
DACK5-
D10
DRQ5
D11
DACK6-
D12
DRQ6
D13
DACK7-
D14
D15
DRQ7
+5V
D16
D17
MASTER-
Ground
D18
D19
Ground
Connector Type: J1 – 64 pins .435" high solder tails
40 pins .435" high solder tails
–
J2
Helix User Manual Revision A.02
View from Top of Board
C0
Ground
C1
SBHE-
C2
LA23
C3
LA22
C4
LA21
C5
LA20
C6
LA19
C7
LA18
C8
LA17
C9
MEMR-
C10
MEMW-
C11
SD8
C12
SD9
C13
SD10
C14
SD11
C15
SD12
C16
SD13
C17
SD14
C18
SD15
C19
Key
www.diamondsystems.com
J1: PC/104 8-bit bus connector
A1
B1
IOCHCHK-
Ground
SD7
A2
B2
RESET
SD6
A3
B3
+5V
SD5
A4
B4
IRQ9
SD4
A5
B5
-5V
SD3
A6
B6
DRQ2
SD2
A7
B7
-12V
SD1
A8
B8
0WS-
SD0
A9
B9
+12V
IOCHRDY
A10
B10
Key
AEN
A11
B11
SMEMW-
SA19
A12
B12
SMEMR-
SA18
A13
B13
IOW-
SA17
A14
B14
IOR-
SA16
A15
B15
DACK3-
A16
B16
SA15
DRQ3
SA14
A17
B17
DACK1-
A18
B18
SA13
DRQ1
SA12
A19
B19
Refresh-
A20
B20
SA11
SYSCLK
SA10
A21
B21
IRQ7
SA9
A22
B22
IRQ6
SA8
A23
B23
IRQ5
SA7
A24
B24
IRQ4
SA6
A25
B25
IRQ3
SA5
A26
B26
DACK2-
A27
B27
SA4
TC
SA3
A28
B28
BALE
A29
B29
SA2
+5V
SA1
A30
B30
OSC
A31
B31
SA0
Ground
Ground
A32
B32
Ground
Page 19
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