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XC-1 Hardware Manual (1.3.2)
5 I/O Expansion Areas [E]
The I/O pins of processor 2 are brought out to expansion areas on both sides of the
card. These areas have 0.1" pitch plated through holes and are suitable for use with
IDC headers. To provide maximum flexibility, no headers are fitted, allowing the
most suitable type to be selected depending on the design. The routing of the I/O
and power pins in the expansion headers is shown below.
X D23
X D21
X2D19
X2D17
X2D15
X2D13
X2D43
X2D41
X2D39
X2D37
Three of the expansion headers provide a bank of 12 I/O pins, while the fourth
provides a bank of eight I/O pins. The pins are mapped to the ports as described in
the table on the next page.
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16
15
GND
5V
X2D22
2
X2D20
2
X2D18
GND
3V3
X2D16
X2D14
X2D12
2
1
16
15
GND
5V
NC
NC
NC
NC
X2D42
3V3
GND
X2D40
X2D38
X2D36
2
1
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1
2
X2D0
X D1
2
X2
X D3
D2
2
X2
X D5
D4
2
3V3
GND
X2D6
X 2D7
X2
X D9
D8
2
X2
X D11
D10
2
5V
GND
15
16
1
2
X2D24
X D25
2
X2
X D27
D26
2
X2
X D29
D28
2
3V3
GND
X2D30
X 2D31
X2
X D33
D32
2
X2
X D35
D34
2
5V
GND
15
16
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