EP7312-CB-90 CIRRUS [Cirrus Logic], EP7312-CB-90 Datasheet - Page 12

• Manufacturer Part Number: EP7312-CB-90
• Description: HIGH-PERFORMANCE, LOW-POWER SYSTEM ON CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE
• Manufacturer: CIRRUS [Cirrus Logic]

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
12
Note:
EXTERNAL MEMORY-
MAPPED EXPANSION
ADDITIONAL I/O
A system can only use one of the following peripheral interfaces at any given time: SSI2,CODEC or DAI.
CRYSTAL
CRYSTAL
SDRAM
SDRAM
FLASH
FLASH
×16
×16
×16
×16
BUFFERS
BUFFERS
LATCHES
AND
SDRAM
SDRAM
FLASH
FLASH
×16
×16
×16
×16
Figure 1. A Fully-Configured EP7312-Based System
©
C opyright Cirrus Logic, Inc. 2003
(All Rights Reserved)
MOSCIN
RTCIN
nCS[2]
nCS[3]
LEDFLSH
D[0-31]
A[0-27]
nMOE
WRITE
nCS[0]
nCS[1]
CS[n]
WORD
SDRAS/
SDCAS
SDCS[0]
SDQM[0-3]
SDCS[1]
SDQM[0-3]
EP7312 completes a low-power system solution. All
necessary interface logic is integrated on-chip.
DRIVE[0-1]
nEXTPWR
nBATCHG
SSIRXDA
RXD[[1/2]
WAKEUP
SSITXDA
SSIRXFR
SSITXFR
LEDDRV
ADCOUT
COL[0-7]
ADCCLK
SMPCLK
nPWRFL
nADCCS
TXD[1/2]
SSICLK
DD[0-3]
PB[0-7]
BATOK
PA[0-7]
PD[0-7]
PE[0-2]
FB[0-1]
PHDIN
ADCIN
nPOR
FRM
RUN
DCD
DSR
CTS
CL1
CL2
M
COMPARATORS
TRANSCEIVERS
ADC
CONVERTERS
PHOTODIODE
SUPPLY UNIT
CODEC/SSI2/
KEYBOARD
IR LED AND
DC-TO-DC
2× RS-232
POWER
AND
LCD
DAI
DIGITIZER
BATTERY
INPUT
DC
DS508PP5