Datasheet

71M6541D/F/G and 71M6542F/G Data Sheet
Rev 4 161
6.9.3 Digital Pins
Table 121 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 6.9.4 I/O Equivalent Circuits.
Table 121: 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