Toshiba e-STUDIO170F Service Manual page 275

• ASIC (Engine controller: IC15) signal table
Pin No. Signal name
1, 2, 20, 41, 51, 59, VSS
60, 70, 80, 93, 101,
121, 122, 139, 149,
158, 161, 170, 179,
180, 191, 200, 210,
221, 229
3 TMS
4 TCK
5 SMC
6 TD1
7 TOD
8 TRST
9-11 MON1-3
12 PLLCLK
13-15 TMD0-2
16 TOUT
17-19, 22 TST0-3
21, 40, 61, 81, 100, VCC
111, 120, 140, 160,
181, 201, 220, 228,
240
23 TEB
24, 25, 26, 27 MT1A, AX, B, BX
28, 29 MISEL1, 2
30 INTPF
31 CTBSYX
32 ETBSYX
33 CMD
34 STS
35 SRCLKX
36 RESETX
37 ROUTX
38, 39 USBRQ0X, 1X
January 2005 © TOSHIBA TEC
I/O
- Signal ground
- Pull-up: 3.3V
- Pull-down: signal ground
- Pull-down: signal ground
- Pull-up: 3.3V
- Not used (Open)
- Pull-down: signal ground
- Not used (Open)
I PLL reference clock
Reference clock for PLL (Phased-Lock Loop) function.
- Pull-down: signal ground
- Not used (Open)
- Pull-down: signal ground
- 3.3V
- Pull-up: 3.3V
O TX motor driver signals A, AX, B, BX
Drives the TX motor for document transport.
O TX motor current control signals 1, 2
Drives the TX motor for document transport.
I Power failure interrupt detect signal (Low-active)
Detects the cut off of 3.3V voltage supply due to power
failure.
O Engine I/F controller status busy signal (Low-active)
The ASIC (Engine controller) indicates to the Engine-
CPU (IC37) that serial information is being transmitted.
I Engine I/F status busy signal (Low-active)
The Engine-CPU indicates to the ASIC (Engine control-
ler) that status is sent by using the STS signal.
O Engine I/F command signal
Signal used for the ASIC (Engine controller) to send
serial information in units of 8 bits to the Engine-CPU.
I Engine I/F status signal
Signal used for the Engine-CPU to send serial informa-
tion in units of 8 bit to the ASIC (Engine controller).
O Engine I/F serial transfer clock
Synchronizing clock for status communication between
the ASIC (Engine controller) and the Engine-CPU.
I Reset signal (Low-active)
Resets the system.
O Watchdog reset signal (Low-active)
Detects crashing of the Main-CPU (IC22).
I USB DMA transfer request signals (Low-active)
The USB controller (IC49) requests the ASIC (Engine
controller) to perform DMA transfer.
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Function
e-STUDIO170F Circuit Description
7