Toshiba ESTUDIO170F, Service Manual

Page: 234 / 492

e-STUDIO170F Circuit Description January 2005 © TOSHIBA TEC
7 - 4
7.1.2 Block Diagram
Fig.7-3
16
16
16
8 8
16
16
16
16
8
8
8
8
SYS-BUS
(16bit
)
16
PIX-BUS
IC22
Main-CPU
(16 MHz
)
IC23
Flash ROM
(2 MB
)
IC16
CODEC
IC4
SRAM
(64 KB
)
IC52 RTC
AFE
circuit
IC51
SRAM
(128 KB
)
Li Battery
(BT101
)
NCU PBA
PSTN
EXT TEL
Speaker
X8
OSC
(28.224 MHz
)
X5
OSC
(32.768 kHz
)
X3
OSC
(32 MHz
)
IC38
ASIC
(I/O port
)
IC37
Engine-CPU
Printer engine
Motor driver
TX
Motor
X1
OSC
(41.716 MHz
)
X2
OSC
(47.234 MHz
)
IC27 DSC
CIS
Regulator
LVPS
5VPS
+12V
-12V
+24V
+5V
IC56
Sub-CPU
X6
OSC
(4 MHz
)
Document
presence/absence
detection
Document
scanning position
detection
Operation panel PBA
LCD
Key switch
LED
OPE I/F
IC53
MODEM
(V.34
)
PC
X4
OSC
(12 MHz
)
Handset
US/CA models: Option SG/HK models: Standard
IC15 ASIC
(Engine controller
)
Address decoder
Interrupt
controller
SDRAM
controller
PC I/F
CODEC
I/F
MODEM I/F
SYS-DMAC
(3CH
)
DSC I/F
PTC I/F
RTC I/F
Motor
controller
PIX-DMAC
(7CH
)
PIX latch
Printer
I/F
Share
memory
Timer
controller
- Watchdog
timer
- Interrupt
timer
- CPU
clock
generator
- ANSDET - Speaker
clock generator
Bus
transceiver
IC1
SDRAM (16 MB
)
IC49 USB
controller
NiMH
Battery
X7
OSC
(12 MHz
)