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| EP7309 Datasheet, PDF (8/46 Pages) Cirrus Logic – HIGH PERFORMANCE LOW POWER SYSTEM ON CHIP ENHANCED DIGITAL AUDIO INTERFACE | |||
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EP7309
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
EP7309 completes a low-power system solution. All
necessary interface logic is integrated on-chip.
CRYSTAL
CRYSTAL
PC CARD
SOCKET
PC CARD
CONTROLLER
Ã16
FLASH
Ã16
FLASH
Ã16
FLASH
Ã16
FLASH
EXTERNAL MEMORY-
MAPPED EXPANSION
BUFFERS
ADDITIONAL I/O
BUFFERS
AND
LATCHES
MOSCIN
RTCIN
nCS[4]
PB0
EXPCLK
D[0-31]
A[0-27]
nMOE
WRITE
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
RXD1/2
TXD1/2
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
2Ã RS-232
TRANSCEIVERS
ADC
DIGITIZER
Figure 1. A Maximum EP7309 Based System
Note: A system can only use one of the following peripheral
interfaces at any given time: SSI2,CODEC or DAI.
8
Copyright 2001 Cirrus Logic (All Rights Reserved)
DS507PP1
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