71M6541DSLASHFSLASHG datasheet(162/166 Pages) MAXIM

162 / 166 page

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

162

Rev 5

(64-pin)

(100-pin)

Name

Type

Circuit

Function

ICE_E

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.

TMUXOUT/SEG47

4, 5

Multiple-Use Pins. Configurable as either multiplexer/clock

output or LCD segment driver using the I/O RAM registers.

TMUX2OUT/SEG46

RESET

Chip Reset. This input pin is used to reset the chip into a

known state. For normal operation, this pin is pulled low. To

reset the chip, this pin should be pulled high. This pin has

an internal 30

μA (nominal) current source pulldown. No

external reset circuitry is necessary.

UART0 Input. If this pin is unused it must be terminated

to V3P3D or GNDD.

UART0 Output

TEST

Enables Production Test. This pin must be grounded in

normal operation.

Pushbutton Input. This pin must be at GNDD when not active

or unused. A rising edge sets the WF_PB flag. It also

causes the part to wake up if it is in SLP or LCD mode. PB

does not have an internal pullup or pulldown resistor.

26, 40,

48, 49,

50, 63,

64, 65,

66, 73,

74, 77,

78, 79,

N/C

—

No Connection. Do not connect this pin.

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