Toshiba DP120F Service Manual page 384

• Sub-CPU Signal Table
No. Signal Name
1 XOUT
2 XIN
3 2WRESETX
4 WTOX
5 LEDBLK
6 R72
7 PWRSVKEY
8 DDET
9 PWRSVACK
10 PWRSVNACK
11 PWRSVLED
12 R51
13 PWRSVDI
14 VSS
15 PWSV
16 HOOK1
17 CISX
I: Input O: Output
March 2000 © TOSHIBA TEC
(1/2)
Type
O Sub-CPU drive clock output (4MHz)
I Sub-CPU drive clock input (4MHz)
I Sub-CPU power-on reset signal (active-low)
Resets the Sub-CPU (IC37) when the power is turned
on.
O Gate control signal (active-low)
Controls the input gate for the line and document
detect signal.
I Power save LED blinking signal (active-low)
Requests the Sub-CPU to blink the power save LED.
I 5VPS power up detect signal (active-high)
I Key input detect signal (active-low)
Detects key inputs.
I Document detect signal (active-low)
Detects the presence or absence of a document.
I Power save acknowledge signal (active-low)
Enables the Sub-CPU to transit to the power save
mode.
I Power save acknowledge signal (active-low)
Indicates restoration from the power save mode to
the Sub-CPU.
O Power save LED lighting signal (L: ON)
Lights the power save LED installed on the Opera-
tion panel PBA.
- Unused
O Port enable signal (active-low)
Controls the signal input from the line and the input
of the document detect signal.
- Signal ground
O Power save control signal (active-low)
Limits the power supply from LVPS in power save
mode.
I Hook detect signal (H: On-hook, L: Off-hook)
Detects the hook state of the handset (Option for
US/CA models only).
I CI detect signal (H: Undetected, L: Detected)
Detects the ring signal sent from line 1 or 2.
I/O: Bidirectional
Functions
7-75 DP120F/DP125F Circuit Description