3 digital pins, Digital pins, Table 120: digital pins – Rainbow Electronics 71M6542G User Manual
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159
6.8.3 Digital Pins
lists the digital pins. Pin types: P = Power, O = Output, I = Input, I/O = Input/Output, N/C = no
connect. The circuit number denotes the equivalent circuit, as specified in
Table 119: Digital Pins
Pin
(64-pin)
Pin
(100-pin)
Name
Type Circuit
Function
4-7
12–15
COM0–COM3
O
5
LCD Common Outputs. These four pins provide the select
signals for the LCD display.
31
45
SEGDIO0/WPULSE
I/O
3, 4, 5
Multiple-Use Pins. Configurable as either LCD segment
driver or DIO. Alternative functions with proper selection of
associated I/O RAM registers are:
SEGDIO0 = WPULSE
SEGDIO1 = VPULSE
SEGDIO2 = SDCK
SEGDIO3 = SDATA
SEGDIO6 = XPULSE
SEGDIO7 = YPULSE
SEGDIO8 = DI
Unused pins must be configured as outputs or
terminated to V3P3/GNDD.
30
44
SEGDIO1/VPULSE
29
43
SEGDIO2/SDCK
28
42
SEGDIO3/SDATA
27
41
SEGDIO4
26
39
SEGDIO5
25
38
SEGDIO6/XPULSE
24
37
SEGDIO7/YPULSE
23
36
SEGDIO8/DI
22-17
35–30
SEGDIO[9:14]
--
29-27
SEGDIO[15:17]
--
25
SEGDIO[18]
16-10
24–18
SEGDIO[19:25]
--
11–4
SEGDIO[28:35]
63-62
95-94
SEGDIO[44:45]
--
99–96
SEGDIO[40:43]
--
52
SEGDIO52
--
51
SEGDIO53
--
47
SEGDIO54
9
17
SEGDIO26/COM5
I/O
3, 4, 5
Multiple-Use Pins. Configurable as either LCD segment
driver or DIO with alternative function (LCD common
drivers).
8
16
SEGDIO27/COM4
3
3
SPI_CSZ/SEGDIO36
I/O
3, 4, 5
Multiple-Use Pins. Configurable as either LCD segment
driver or DIO with alternative function (SPI interface).
2
2
SPI_DO/SEGDIO37
1
1
SPI_DI/SEGDIO38
64
100
SPI_CKI/SEGDIO39
33
53
OPT_TX/SEGDIO51
I/O
3, 4, 5
Multiple-Use Pins, configurable as either LCD segment
driver or DIO with alternative function (optical port/UART1)
32
46
OPT_RX/SEGDIO55
38
58
E_RXTX/SEG48
I/O
1, 4, 5 Multiuse Pins. Configurable as either emulator port pins
(when ICE_E pulled high) or LCD segment drivers (when
ICE_E tied to GND).
36
56
E_RST/SEG50
37
57
E_TCLK/SEG49
O
4, 5