Main -Com : Upd75217Cw-136 (Ic6) - Kenwood DP-M993 Service Manual

CIRCUIT DESCRIPTION
2-2. Block diagram and key matrix
10
(--
ІС6
Output expander
CXD1067P
IC8
2-3. Pin functions : uUuPD75217CW-136
Pin No. |Pinname МО | — Function |
Clock output port for CXD1067 and
TC74HC165
О |Data output port for CXD1067
| |Data input port for TC74HC165
| (Remote control signal input port
| "Photo interrupter input port for
mechanism up/down
Clock output port for NM93C66
Data output port for NM93C66
Not use
Latch signal output port for CXD1067
О "Not use
STROB signal output port for
SDATA VO ||DATA signal input/output port for
System serial communication
System serial communication
ep
MAIN -COM : uPD75217CW-136
Intput expander
TC74HC165AP
ври Serial code UO
SERVO D.S.P.
MC159236AFU
[C2
ICH
[Pin No. [Pin name 0 | Function — |
| 23 |ССЕ | О |CCE control port for MC159236AFU
[ 24 |BUCK | O [BUCK control port for MC159236AFU
~ BUS3 MC159236AFU
Cæ [sc [oss 71
ГІ [System бостира]
36-38
Display digit control port
E
Ен
EN
EN
иш
ЕШ
| Oo |
[o|
50 ~ 55 | p~k Display segment control port
aRU =
EN
Return key input of key matrix
Display drive negative power supply
(-35V)
Display pre-driver negative power
supply (-5V)
Display segments control port
(key scan)
Power supply (4-5V)
- DP-M993/M5550/M6650
15