Cirrus Logic EP7312 - Manual (Page 12)

12
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Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved) DS508F2
EP7312
High-Performance, Low-Power System on Chip
System Design
As shown in system block diagram, simply adding desired
memory and peripherals to the highly integrated EP7312 completes a low-power system solution. All necessary
interface logic is integrated on-chip.
Figure 1. A Fully-Configured EP7312-Based System
Note: A system can only use one of the following peripheral interfaces at any given time: SSI2,CODEC or DAI.
LCD
KEYBOARD
BATTERY
DC-TO-DC
CONVERTERS
ADC DIGITIZER
IR LED AND
PHOTODIODE
2 RS-232
TRANSCEIVERS
ADDITIONAL I/O
DD[0-3]
CL1
CL2
FRM
M
D[0-31]
A[0-27]
COL[0-7]
PA[0-7]
DC
INPUT
nMOE
WRITE
PB[0-7]
PD[0-7]
PE[0-2]
nPOR
nPWRFL
BATOK
nEXTPWR
nBATCHG
RUN
WAKEUP
nCS[0]
nCS[1]
DRIVE[0-1]
FB[0-1]
EP7
312
ADCCLK
nADCCS
ADCOUT
ADCIN
SMPCLK
LEDDRV
PHDIN
RXD[[1/2]
TXD[1/2]
DSR
CTS
DCD
CS[n]
WORD
nCS[2]
nCS[3]
16
FLASH
16
FLASH
6
FLASH
EXTERNAL MEMORY-
MAPPED EXPANSION
BUFFERS
BUFFERS
AND
LATCHES
16
FLASH
POWER
SUPPLY UNIT
AND
COMPARATORS
CRYSTAL
CODEC/SSI2/
DAI
SSICLK
SSITXFR
SSITXDA
SSIRXDA
SSIRXFR
RTCIN
LEDFLSH
CRYSTAL MOSCIN
16
SDRAM
16
SDRAM
6
SDRAM
16
SDRAM
SDCS[1]
SDQM[0-3]
SDCS[0]
SDQM[0-3]
SDRAS/
SDCAS