Datasheet
71M6543F/71M6543G Data Sheet
v2 149
6.8.3 71M6543 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 Section 6.8.4.
Table 112: 71M6543 Digital Pins
Pin Name Type Circuit Function
12–15 COM0–COM3 O 5
LCD Common Outputs. These four pins provide the select
signals for the LCD display.
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 (45)
SEGDIO1 = VPULSE (44)
SEGDIO2 = SDCK (43)
SEGDIO3 = SDATA (42)
SEGDIO6 = XPULSE (38)
SEGDIO7 = YPULSE (37)
SEGDIO8 = DI (36)
Unused pins must be configured as outputs or
terminated to V3P3/GNDD.
44 SEGDIO1/VPULSE
43
SEGDIO2/SDCK
42
SEGDIO3/SDATA
41 SEGDIO4
39
SEGDIO5
38
SEGDIO6/XPULSE
37 SEGDIO7/YPULSE
36
SEGDIO8/DI
35–27
SEGDIO[9:17]
25–18 SEGDIO[18:25]
11–4
SEGDIO[28:35]
99–94
SEGDIO[40:45]
52 SEGDIO52
51
SEGDIO53
47
SEGDIO54
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).
16
SEGDIO27/COM4
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
SPI_DO/SEGDIO37
1
SPI_DI/SEGDIO38
100
SPI_CKI/SEGDIO39
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)
46
OPT_RX/SEGDIO55
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).
56
E_RST/SEG50
57
E_TCLK/SEG49
O
4, 5
59 ICE_E I 2
ICE Enable. When zero, E_RST, E_TCLK, and E_RXTX
become SEG50, SEG49, and SEG48 respectively. For
production units, this pin should be pulled to GND to disable
the emulator port.
92
TMUXOUT/SEG47
O 4, 5
Multiple-Use Pins. Configurable as either multiplexer/clock
output or LCD segment driver using the I/O RAM registers.
93
TMUX2OUT/SEG46