Cirrus Logic EP73xx - Manual (Page 26)

1-12 EP7309/11/12 User’s Manual - DS508UM4
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Copyright Cirrus Logic, Inc. 2003
Introduction
1
References
• ARM720T Technical Reference Manual, Revision 3 (ARM DDI 0192A)
• ARM System-on-Chip Architecture, 2nd Edition, by Steve Furberu
Note: Click on the ARM Documentation site to view more documents.
Figure 1-2. Typical EP73xx System Block Diagram
LCD
KEYBOARD
BATTERY
DC-TO-DC
CONVERTERS
ADC DIGITIZER
IR LED AND
PHOTODIODE
2 × RS-232
TRANSCEIVERS
ADDITIONAL I/O
PC CARD
CONTROLLER
PC CARD
SOCKET
nCS[4]
PB0
EXPCLK
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]
EP73XX
ADCCLK
nADCCS
ADCOUT
ADCIN
SMPCLK
LEDDRV
PHDIN
RXD1/2
TXD1/2
DSR
CTS
DCD
CS[n]
WORD
nCS[2]
nCS[3]
×16
FLASH
×16
FLASH
×16
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
×16
SDRAM
×16
SDRAM
SDCS[1]
SDQM[0-3]
SDCS[0]
SDQM[0-3]
SDRAS/
SDCAS