71M6543F Datasheet, PDF (152/157 Pages) Maxim Integrated Products – Selectable Gain of 1 or 8 for One Current Energy Meter ICs Metrology Compensation

71M6543F/H and 71M6543G/GH Data Sheet
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 114: 71M6543 Digital Pins
Pin
12–15
Name
COM0–COM3
Type Circuit
Function
O
5
LCD Common Outputs. These four pins provide the select
signals for the LCD display.
45
SEGDIO0/WPULSE
44
SEGDIO1/VPULSE
43
SEGDIO2/SDCK
42
41
39
38
37
36
35–27
25–18
11–4
99–94
SEGDIO3/SDATA
SEGDIO4
SEGDIO5
SEGDIO6/XPULSE
SEGDIO7/YPULSE
SEGDIO8/DI
SEGDIO[9:17]
SEGDIO[18:25]
SEGDIO[28:35]
SEGDIO[40:45]
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)
I/O 3, 4, 5 SEGDIO3 = SDATA (42)
SEGDIO6 = XPULSE (38)
SEGDIO7 = YPULSE (37)
SEGDIO8 = DI (36)
Unused pins must be configured as outputs or
terminated to V3P3/GNDD.
52
SEGDIO52
51
SEGDIO53
47
SEGDIO54
17
SEGDIO26/COM5
Multiple-Use Pins. Configurable as either LCD segment
I/O 3, 4, 5 driver or DIO with alternative function (LCD common
16
SEGDIO27/COM4
drivers).
3
SPI_CSZ/SEGDIO36
2
1
SPI_DO/SEGDIO37
SPI_DI/SEGDIO38
I/O
3, 4, 5
Multiple-Use Pins. Configurable as either LCD segment
driver or DIO with alternative function (SPI interface).
100 SPI_CKI/SEGDIO39
53
46
OPT_TX/SEGDIO51
OPT_RX/SEGDIO55
I/O
3, 4, 5
Multiple-Use Pins, configurable as either LCD segment
driver or DIO with alternative function (optical port/UART1)
58
E_RXTX/SEG48
I/O 1, 4, 5 ^{Multiuse Pins. Configurable as either emulator port pins}
56
E_RST/SEG50
(when ICE_E pulled high) or LCD segment drivers (when
57
E_TCLK/SEG49
O
4, 5 ^{ICE_E tied to GND).}
ICE Enable. When zero, E_RST, E_TCLK, and E_RXTX
59
ICE_E
I
2
become SEG50, SEG49, and SEG48 respectively. For
production units, this pin should be pulled to GND to disable
the emulator port.
92
93
TMUXOUT/SEG47
O
TMUX2OUT/SEG46
4, 5
Multiple-Use Pins. Configurable as either multiplexer/clock
output or LCD segment driver using the I/O RAM registers.
152
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