User's Manual
Turbo PMAC2 PCI Ultralite HRM
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Connector PinOuts 5
J2: (JTHW) Multiplexer Port
The J2 (JTHW) multiplexer port provides eight inputs and eight outputs at TTL levels. Typically these are
used to create multiplexed I/O with accessory boards such as ACC-34 (Discrete I/O), to Opto-22 or
similar hardware. J2 inputs/outputs may also be used directly as non-multiplexed discrete digital I/Os.
J2: 26-pin IDC header (M)
Mating: 26-pin IDC header (F)
Front view
135791113151719
2468101214161820
2123
2224
25
26
Pin#
Symbol
Function
Description
Notes
1
GND
Common Ground
Tied to digital ground
2
GND
Common Ground
Tied to digital ground
3
DAT0
Input
Data-0 Input
Data input from MUX port accessories
4
SEL0
Output
Select0 Output
Address/data output for MUX port accessories
5
DAT1
Input
Data1 Input
Data input from MUX port accessories
6
SEL1
Output
Select1 Output
Address/data output for MUX port accessories
7
DAT2
Input
Data2 Input
Data input from MUX port accessories
8
SEL2
Output
Select2 Output
Address/data output for MUX port accessories
9
DAT3
Input
Data3 Input
Data input from MUX port accessories
10
SEL3
Output
Select3 Output
Address/data output for MUX port accessories
11
DAT4
Input
Data4 Input
Data input from MUX port accessories
12
SEL4
Output
Select4 Output
Address/data output for MUX port accessories
13
DAT5
Input
Data5 Input
Data input from MUX port accessories
14
SEL5
Output
Select5 Output
Address/data output for MUX port accessories
15
DAT6
Input
Data6 Input
Data input from MUX port accessories
16
SEL6
Output
Select6 Output
Address/data output for MUX port accessories
17
DAT7
Input
Data7 Input
Data input from MUX port accessories
18
SEL7
Output
Select7 Output
Address/data output for MUX port accessories
19
N.C.
N.C.
Not connected
20
GND
Common Ground
Tied to digital ground
21
BRLD/
Output
Buffer Request
Low is Buffer Request
22
GND
Common Ground
Tied to digital ground
23
IPLD/
Output
In Position
Low is In Position
24
GND
Common Ground
Tied to digital ground
25
+5V
Output
Reference
Power supply out
26
INIT/
Input
PMAC Reset
Low is Reset