BM-23MK2
Y IC Pin Function Description
LCD BOARD IC701 SYSTEM CONTROLLER (BU2456-24)
Pin No.Pin NameI/ODescription
1INTIReset terminal
2GNDNGND terminal
1. When POWER IN becomes level OL�, UP counter, BATT, or LTR is displayed
according to PHOTO IN change.
3POWERI
2. When POWER IN becomes level OH�, the HALT state is set, displaying is stopped,
and the detection of all inputs are also stopped.
4IN CTLORc/Rd input control terminal
5COM1OCOM 1 First digit (first digit from the right)
6COM2OCOM 2 Second digit (second digit from the right)
BATT IN
1. When BATT1=H, and BATT2=L, Ou� is displayed.
2. When BATT1=H, and BATT2=L, Oy� is displayed.
3. When BATT1=H, and BATT2=L, Ot� is displayed.
7BATT1 (RESET)I
4. When BATT1=H, and BATT2=L, Oe� is displayed.
5. BATT IN will not be accepted during HALT.
RESET IN
1. Forces the counter to display O888� while it is displaying.
2. Set the RAM of the counter to display O888� while the LTR is displayed.
3. RESET IN will not be accepted during HALT.
8BATT2 (LTR)ILTR IN
1. The counter is stopped if it is displaying and OL� is displayed.
2. Even if OL� is displayed, the counter will operate.
3. LTR IN will not be accepted during HALT.
1. When the tape is rotated while the tape recorder is operating, photo detection is input.
9PHOTOI
2. PHOTO IN will not be accepted during HALT.
1. The DOWN counter is set when L and the UP counter is set when H.
10BSI
2. BS IN will not be accepted during HALT.
11SEG8OSegment output terminal
12NCN
13NCN
14SEG1OSegment output terminal
15SEG2OSegment output terminal
16SEG3OSegment output terminal
17SEG4OSegment output terminal
18SEG5OSegment output terminal
19SEG6OSegment output terminal
20SEG7OSegment output terminal
21COM3OCOM 3 Third digit (third digit from the right)
22OSCOXOtal oscillation terminal (1MHz)
23OSCIXOtal oscillation terminal (1MHz)
24VCCNPower supply terminal
21 |
ACEC
SONY
