EP7309 Datasheet, PDF (7/46 Pages) Cirrus Logic – HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE

EP7309
High-Performance, Low-Power System on Chip
Internal Boot ROM
The internal 128 byte Boot ROM facilitates download of
saved code to the on-board SRAM/FLASH.
Packaging
The EP7309 is available in a 208-pin LQFP package, 256-
ball PBGA package or a 204-ball TFBGA package.
Pin Multiplexing
The following table 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. The choice between the SSI2, CODEC,
and the DAI is controlled by the DAISEL bit in SYSCON3
(see the EP7309 User’s Manual for more information).
Pin
Mnemonic
I/O
DAI
SSI2 CODEC
SSICLK
SSITXDA
SSIRXDA
I/O
SCLK
SSICLK PCMCLK
O
SDOUT SSITXDA PCMOUT
I
SDIN
SSIRXDA PCMIN
Table Q. DAI/SSI2/CODEC Pin Multiplexing
Pin
Mnemonic
I/O
DAI
SSI2 CODEC
SSITXFR
SSIRXFR
BUZ
I/O
LRCK
SSITXFR PCMSYNC
I
MCLKIN SSIRXFR
p/u
O MCLKOUT
Table Q. DAI/SSI2/CODEC Pin Multiplexing
The following table shows the pins that have been
multiplexed in the EP7309.
Signal
RUN
nMEDCHG
PD[0]
PE[1:0]
PE[2]
Block
Signal
Block
System
Configuration
Interrupt
Controller
GPIO
GPIO
GPIO
CLKEN
System
Configuration
nBROM
Boot ROM
select
LEDFLSH
LED Flasher
BOOTSEL[1:0]
System
Configuration
CLKSEL
System
Configuration
Table R. Pin Multiplexing
DS507PP1
Copyright 2001 Cirrus Logic (All Rights Reserved)
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