Rainbow Electronics AT75C310 User Manual

Page 4

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AT75C310

4

USART A

RXDA

I

Receive Data

TXDA

O

Transmit Data

NRTSA

O

Ready to Send

NCTSA

I

Clear To Send

NDTRA

O

Data Terminal Ready

NDSRA/BOOTN

I

Data Set Ready

NDCDA

I

Data Carrier Detect

NRIA

I

Ring Indicator

SCLKA

I/O

Serial Clock

USART B

RXDB

I

Receive Data

TXDB

O

Transmit Data

JTAG Interface

NTRST

I

JTAG Test Reset

TCK

I

JTAG Test Clock

TMS

I

JTAG Test Mode Select

TDI

I

JTAG Test Data Input

TDO

O

JTAG Test Data Output

Codec Interface A

SCLKA

I/O

Codec Serial Clock

FSA

I/O

Frame Sync Pulse

STXA

O

Transmit Data to Codec

SRXA

I

Receive Data from Codec

Codec Interface B

SCLKB

I/O

Codec Serial Clock

FSB

I/O

Frame Sync Pulse

STXB

O

Transmit Data to Codec

SRXB

I

Receive Data from Codec

Miscellaneous

RESET

I

Master Reset

FIQ/LOWP

I

Fast Interrupt/Low Power

IRQ0

I

External Interrupt request

XREF96

I

External 96 MHz PLL Reference

XREF80

I

External 80 MHZ PLL Reference

XTALIN

I

External Crystal Input

XTALOUT

O

External Crystal Output

TST

I

Test Mode

Table 2. AT75C310 Pin Description (Continued)

Block

Pin Name

Type

Function