Sharp UX-B20 Service Manual page 56

UX-B20U/UX-B20C/B25C
2.3. Panel control block
The following controls are performed by the SCE209L.
• Operation panel key scanning
• Operation panel LCD display
2.4. Mechanism/recording control block
• Recording control block diagram
TBRESN
THUNDERBOLT
CSN
SCK
SDI
CLK
DWEN
CAS_N
RAS_N
DRAM
D[15:0]
A[11:0]
INK
PWB
OPO[4:0]*
OPERATOR
OPI[3:0]*
PANEL,
KEYPAD,
LCD LCDCS*
CLOCK
INTN
WAIT
ASICRES
GACSN
RDN
WRN
PDAT
PCLK
PLAT
µPD65944 A[5:0]
D[7:0]
SCANNER SM[3:0]*
MOTOR DRIVERS
START
SCANNER
CLK2
CONTROLS
SCANNER
VIN
VIDEO
PREPROCESSING
SSCLK[2:1]*
SERIAL SYNC SSTXD[2:1]*
PORTS
SSRXD[2:1]*
(SSIF)
SSSTAT[2:1]*
GENERAL GPIO
PURPOSE I/O
SASCLK*
SYNC/ASYNC
SASTXD*
SERIAL PORT
SASIF SASRXD*
PIN
PIN SENSOR
TEST[1:0]
BATRSTN
RESETN
TONE
ALTTONE
TSTCLK
REGDMA
WAITN
SYNC
PWRDWNN
INTPWRDWNEN
XIN
XOUT
SXIN
SXOUT
INTERNAL
SCE209L
1-CHIP
FAX ENGINE
EXTERNAL BUS
A[23:0]
D[7:0]
RDN
WRN
ROMCSN
CS[5:0]N*
DEBUGN
VDD
VDRAM
VBAT
VSS
NOTES: * ALTERNATIVE GPO, GPI OR GPIO LINES
ADVA
ADGA
Fig. 3
5 – 7
RTC
CRYSTAL
SYSCLK
CRYSTAL
TELEPHONE
LINE
RXIN
LINE
TXOUT
INTERFACE
IA
FLASHWRN
ROMCSN
FLASH
MEMORY
RDN
CAS[0,1]N, RASN, DWRN
DRAM
**FOR SAMSUNG NAND-TYPE FLASH