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2-3-1 Main board
2.5V Regulator
+5V
+2.5V
Xtal (VIDEO)
17.483375MHz
Xtal (CCD)
14.798200MHz
ASIC debugger I/F
DBOUT7-0
DBOUT7-0
DQM3-1, RASN, CASN
WEN, BA1, BA0
CK2, CK3, MCS4N, MCSGN
IICSCL
IICSDA
SDRAM data bus
SDRAM address bus
SDRAM
8MB
DIMM
slot
SDRAM
8MB
APC I/F
ASIC
9.71MHz
(SYSTEM)
19.42MHz
(MEMORY)
CK1
MCSON
CK0
VDATA
SAMPLEN
PDN
OUTPEN
Figure 2-3-1 Main board circuit block diagram
CCDCLKN, CCDCLK, RSN, CPN, SH
IMG7-0
ADCCLK, SHD, LCLP
OEB, AFESDENB
A F/E
AFESDIN, AFESDCLK
Xtal
(SYSTEM)
9.71MHz
LEDON, LED1N, LED2N, LED3N
CPUCLK
LED4N, LED5N, LED6N, BUZERDRN
9.71MHz
PLL
CPU
READYN
INTREQN
RD, WR
CPUA23-21
CPUA18-0
CPUD7-0
CSAION
SCKN, FGSO
SBSY, EGSI, SDIR, EGIRN, PDMASKN
RSTN
Scanner I/F
CCDG(O)
CCDG(E)
CCDR
Operator panel I/F
KEYON, KEY1N, EY2N
SCANON, SCAN1N, SCAN2N, SCAN3N
SCAN4N, SCAN5N
EEDIO
EEPROM
EESCL
DBRXD
Debugger
DBTXD
connector
Decoder
CSSRAMN
CPUD7-0
CPUA14-0
WR, RD
CSFLASHN
CPUD7-0
CPUA17-0
WR, RD
RD
CSROMN
CPUD7-0
CPUA17-0
PLGCLK
PDMASKN
OVSYNCN
2DC
SRAM
256kbit
Flash
ROM
4Mbit
CODE
DIMM
4Mbit
Engine I/F
2-3-1
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