73M2921 datasheet(39/41 Pages) ETC

39 / 41 page

73M2921

Advanced Single

Chip Modem

February 99 Rev M

TDK Semiconductor

Page 39 of 41

PINOUT

100 PIN QFP - PRODUCTION PACKAGE PINOUT

QFP Pin

Pin Name

Pin Description

QFP Pin

Pin Name

Pin Description

n/c

INNA

analog negative input

n/c

VPA

analog positive power supply

VPD

digital positive power supply

VNA

analog negative power supply

VND

digital negative power supply

MON

speaker driver output

5-12

UD[0-7]

8 bit microcontroller data

bus, bidirectional

:$.(

microcontroller wake-up

output

13,14

UA[0, 1]

2 bit microcontroller

address

RESET

reset chip input

microcontroller chip select

input

TXD

transmit serial data input

µP write enable input

TXCLK

transmit data clock output

µP read enable input

n/c

8,17

µP interrupt output

RXD

receive serial data output

MICCLK

microcontroller clock output

RXCLK

receive data clock output

VND

digital negative power

supply

46-49

for factory use, make no

connections

XTALO

crystal oscillator output

PEXT

for factory use; tie to ground

XTALI

crystal oscillator (clock)

input

VPD

digital positive power supply

VPD

digital positive power supply

VND

digital negative power supply

5,1*

ring detect input

53-57

n/c

58-73

for factory use, make no

connections

'7,

data transition 0 input

VND

digital negative power supply

VNA

analog negative power

supply

75-81

n/c

VPD

digital positive power supply

VPA

analog positive power

supply

n/c

OUTNA

analog negative output

84-90

for factory use, make no

connections

OUTPA

analog positive output

n/c

VREF

analog voltage reference

output

VBG

bandgap bypass point

INPA

analog positive input

92-100

for factory use, make no

connections

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