EP7312_05 Datasheet, PDF (12/64 Pages) Cirrus Logic – High-performance, Low-power, System-on-chip with SDRAM & Enhanced with SDRAM & Enhanced

EP7312
High-Performance, Low-Power System on Chip
System Design
As shown in system block diagram, simply adding desired completes a low-power system solution. All necessary
memory and peripherals to the highly integrated EP7312 interface logic is integrated on-chip.
CRYSTAL
CRYSTAL
×16
SDRAM
×16
SDRAM
×16
SDRAM
×16
SDRAM
×16
FLASH
×16
FLASH
×16
FLASH
×16
FLASH
EXTERNAL MEMORY-
MAPPED EXPANSION
BUFFERS
ADDITIONAL I/O
BUFFERS
AND
LATCHES
MOSCIN
RTCIN
D[0-31]
A[0-27]
nMOE
WRITE
SDRAS/
SDCAS
SDCS[0]
SDQM[0-3]
SDCS[1]
SDQM[0-3]
nCS[0]
nCS[1]
CS[n]
WORD
nCS[2]
nCS[3]
LEDFLSH
DD[0-3]
CL1
CL2
FRM
M
COL[0-7]
PA[0-7]
PB[0-7]
PD[0-7]
PE[0-2]
nPOR
nPWRFL
BATOK
nEXTPWR
nBATCHG
RUN
WAKEUP
DRIVE[0-1]
FB[0-1]
SSICLK
SSITXFR
SSITXDA
SSIRXDA
SSIRXFR
LEDDRV
PHDIN
RXD[[1/2]
TXD[1/2]
DSR
CTS
DCD
ADCCLK
nADCCS
ADCOUT
ADCIN
SMPCLK
LCD
KEYBOARD
POWER
SUPPLY UNIT
AND
COMPARATORS
DC
INPUT
BATTERY
DC-TO-DC
CONVERTERS
CODEC/SSI2/
DAI
IR LED AND
PHOTODIODE
2× RS-232
TRANSCEIVERS
ADC
DIGITIZER
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.
12
©Copyright Cirrus Logic, Inc. 2005
(All Rights Reserved)
DS508F1