ep7309 Cirrus Logic, Inc., ep7309 Datasheet - Page 11

• Manufacturer Part Number: ep7309
• Description: Ep7309 Data Sheet
• Manufacturer: Cirrus Logic, Inc.

System Design
As shown in system block diagram, simply adding desired
memory and peripherals to the highly integrated EP7309
DS507F1
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.
PC CARD
SOCKET
CRYSTAL
CRYSTAL
FLASH
FLASH
×16
×16
CONTROLLER
BUFFERS
BUFFERS
LATCHES
PC CARD
AND
FLASH
FLASH
×16
×16
Figure 1. A Maximum EP7309 Based System
©
Copyright Cirrus Logic, Inc. 2005
(All Rights Reserved)
MOSCIN
nCS[2]
nCS[3]
RTCIN
nCS[4]
PB0
EXPCLK
nCS[0]
nCS[1]
CS[n]
WORD
D[0-31]
A[0-27]
nMOE
WRITE
LEDFLSH
completes a low-power system solution. All necessary
interface logic is integrated on-chip.
DRIVE[0-1]
nEXTPWR
nBATCHG
SSIRXDA
WAKEUP
SSITXDA
SSIRXFR
SSITXFR
LEDDRV
ADCOUT
COL[0-7]
nPWRFL
ADCCLK
nADCCS
SMPCLK
SSICLK
DD[0-3]
BATOK
PA[0-7]
PB[0-7]
PD[0-7]
RXD1/2
PE[0-2]
FB[0-1]
TXD1/2
PHDIN
ADCIN
nPOR
FRM
RUN
DSR
DCD
CTS
CL1
CL2
M
High-Performance, Low-Power System on Chip
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
EP7309
11