71M6541DSLASHFSLASHG datasheet(161/166 Pages) MAXIM

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71M6541D/F/G and 71M6542F/G Data Sheet

Rev 5

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

(64-pin)

(100-pin)

Name

Type

Circuit

Function

4-7

12–15

COM0–COM3

LCD Common Outputs. These four pins provide the select

signals for the LCD display.

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.

SEGDIO1/VPULSE

SEGDIO2/SDCK

SEGDIO3/SDATA

SEGDIO4

SEGDIO5

SEGDIO6/XPULSE

SEGDIO7/YPULSE

SEGDIO8/DI

22-17

35–30

SEGDIO[9:14]

29-27

SEGDIO[15:17]

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]

SEGDIO52

SEGDIO53

SEGDIO54

SEGDIO26/COM5

I/O

3, 4, 5

Multiple-Use Pins. Configurable as either LCD segment

driver or DIO with alternative function (LCD common

drivers).

SEGDIO27/COM4

SPI_CSZ/SEGDIO36

I/O

3, 4, 5

Multiple-Use Pins. Configurable as either LCD segment

driver or DIO with alternative function (SPI interface).

SPI_DO/SEGDIO37

SPI_DI/SEGDIO38

100

SPI_CKI/SEGDIO39

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)

OPT_RX/SEGDIO55

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).

E_RST/SEG50

E_TCLK/SEG49

4, 5

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