Toshiba DP120F, Service Manual

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March 2000 © TOSHIBA TEC 7-59 DP120F/DP125F Circuit Description
• DMAC GA Signal Table (6/7)
No. Signal Name Type Functions
142 SPK O Speaker clock
Outputs a clock for the artificial ring and tone sig-
nals.
143-146 DM0-3 - Monitor signal
147 ROUTX O Watchdog reset signal (active-low)
Detects crashing of the CPU (IC66).
149 BUENA O Backup data presence signal (H: Present, L: Absent)
Indicates the presence or absence of backup data.
150 BUCHG O Backup latch signal (up edge trigger)
Holds the presence or absence status of backup data.
151 CHRON - Monitor signal
152-156 DOP2-7 - Monitor signal
158 X32M I System clock input (32.0000MHz)
160 PIXRDY I PIX-DRAM ready signal
Indicates that the data to be transferred to the PIX-
DRAM (IC25) is ready for transfer.
161 IPRTA1 I +5V power supply supervisory signal
Inputs a power supply voltage of +5V through a re-
sistor and supervises the voltage.
162-167 IPRTA2-7 - Signal ground (Pull down)
169 RESETX I Reset signal (active-low)
Resets the system.
170-172 TST0-2 I Signal ground
173 ANSDET2 I Line 2 frequency detect signal
Detects the frequency which flows through the con-
nection line of the line 2 NCU PBA.
174 ANSDET1 I Line 1 frequency detect signal
Detects the frequency which flows through the con-
nection line of the line 1 NCU PBA.
175 INTMD1 I Line 1 MODEM interrupt signal (active-low)
The interrupt signal of the MODEM (IC5) is input.
(Interrupt level 6)
176 MDRRQ1 I Line 1 MODEM receive data transfer request signal
The MODEM makes a request to transfer receive
data.
I: Input O: Output I/O: Bidirectional