EP7312-IV-90 datasheet(11/64 Pages) CIRRUS

Part #	EP7312-IV-90

Description	HIGH-PERFORMANCE, LOW-POWER SYSTEM ON CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE

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Manufacturer	CIRRUS [Cirrus Logic]

Direct Link	http://www.cirrus.com

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11 / 64 page

DS508PP5

©Copyright Cirrus Logic, Inc. 2003

11

EP7312

High-Performance, Low-Power System on Chip

Pin Multiplexing

Table 18 shows the pin multiplexing of the DAI, SSI2 and

the CODEC. The selection between SSI2 and the CODEC

is controlled by the state of the SERSEL bit in SYSCON2.

Thechoicebetween theSSI2, CODEC, and the DAIis

controlled by the DAISEL bit in SYSCON3 (see the

EP7312 User’s Manual

for more information).

Table 19 shows the pins that have been multiplexed in

the EP7312.

Table 18. DAI/SSI2/CODEC Pin Multiplexing

Mnemonic

I/O

DAI

SSI2

CODEC

SSICLK

I/O

SCLK

SSICLK

PCMCLK

SSITXDA

O

SDOUT

SSITXDA

PCMOUT

SSIRXDA

I

SDIN

SSIRXDA

PCMIN

SSITXFR

I/O

LRCK

SSITXFR

PCMSYNC

SSIRXFR

I

MCLKIN

SSIRXFR

p/u

BUZ

O

MCLKOUT

Table 19. Pin Multiplexing

Signal

Block

Signal

Block

nMOE

Static Memory

nSDCAS

SDRAM

nMWE

Static Memory

nSDWE

SDRAM

WRITE

Static Memory

nSDRAS

SDRAM

A[27:15]

Static Memory

DRA[0:12]

SDRAM

A[14:13]

Static Memory

DRA[13:14]

SDRAM

PD[7:6]

GPIO

SDQM[1:0]

SDRAM

RUN

System

Configuration

CLKEN

System

Configuration

nMEDCHG

Interrupt

Controller

nBROM

Boot ROM

select

PD[0]

GPIO

LEDFLSH

LED Flasher

PE[1:0]

GPIO

BOOTSEL[1:0]

System

Configuration

PE[2]

GPIO

CLKSEL

System

Configuration

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EP7312-IV-90 Datasheet(PDF) 11 Page - Cirrus Logic

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