Owner's manual

DS508F2 Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved) 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. The
choice between the SSI2, CODEC, and the DAI is 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
Pin
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