Chapter 5
Signal Connections
5-14
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Figure 5-7.
68-Pin Digital I/O Connector Pin Assignments
The 32-bit digital I/O port is configured in hardware as four 8-bit digital I/O
ports. The bits in a port are typically controlled and read with byte-wide
bitmapped commands.
Port 4:bit 7
Digital Ground
Port 4:bit 4
Port 4:bit 3
Digital Ground
Port 4:bit 0
Port 3:bit 7
Digital Ground
Port 3:bit 4
Port 3:bit 3
Digital Ground
Port 3:bit 0
Port 2:bit 7
Port 2:bit 6
Digital Ground
Digital Ground
Digital Ground
Port 2:bit 1
Port 2:bit 0
Port 1:bit 7
Digital Ground
Port 1:bit 4
Port 1:bit 3
Digital Ground
Port 1:bit 0
PWM2
Reserved
Reserved
Reserved
PWM1
Reserved
Reserved
PCLK
+5 V
Digital Ground
Port 4:bit 5
Digital Ground
Port 4:bit 1
Digital Ground
Port 3:bit 6
Port 3:bit 5
Port 4:bit 6
Port 4:bit 2
Digital Ground
Port 3:bit 2
Port 3:bit 1
Digital Ground
Digital Ground
Port 2:bit 5
Port 2:bit 4
Port 2:bit 3
Port 2:bit 2
Digital Ground
Digital Ground
Port 1:bit 6
Port 1:bit 5
Digital Ground
Port 1:bit 2
Port 1:bit 1
Digital Ground
Digital Ground
Digital Ground
Reserved
Digital Ground
DPull
Digital Ground
Digital Ground
Digital Ground
1
35
2
36
3
37
4
38
5
39
6
40
7
41
8
42
9
43
10 44
11 45
12 46
13 47
14 48
15 49
16 50
17 51
18 52
19 53
20 54
21 55
22 56
23 57
24 58
25 59
26 60
27 61
28 62
29 63
30 64
31 65
32 66
33 67
34 68
