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參數(shù)資料
| 型號： | LC737212M |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | Telephone Dialer IC with On-Chip Memory for Push- Button Telephones |
| 中文描述： | 電話撥號集成電路片上推內(nèi)存按鈕電話 |
| 文件頁數(shù)： | 20/27頁 |
| 文件大小： | 308K |
| 代理商： | LC737212M |
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Key Codes
Mode change (when the IC internal state changes)
— Here the data consists of eight bits, one bit (which is always 1) used to differentiate this data from key data, and
seven bits expressing the mode change. This data is output when the internal state changes, the P/T pin changes, or
when dialing completes.
— D5 expresses the state of the P/T pin.
1 = pules, 0 = DTMF
In the following cases, the status is not output even if the P/T pin changes state.
In standby mode, off-hook hold mode, or on-hook hold mode.
After tone data (including MC) is written to RD memory.
— When a memory location that does not have data stored is accessed:
If not dialing: the status when dialing completed is output as serial data.
If dialing: A serial output operation is not performed.
— If a redial operation is attempted when redial is disabled (when the last number dialed exceeded 63 digits) the
status when dialing completed is output as serial data.
* Timing Chart
· From the standby state to off hook, and then to off-hook dialing
· With the P/T switch set to P
No. 5203-20/27
LC737212, 737212M
KEY
KEY CODE
KEY
ROW
COL
D7
D6
D5
D4
D3
D2
D1
D0
HEX
00
1
5
0
0
0
0
0
0
0
0
0
0
01
2
5
0
0
0
0
0
0
0
1
0
1
02
3
5
0
0
0
0
0
0
1
0
0
2
03
4
5
0
0
0
0
0
0
1
1
0
3
04
5
5
0
0
0
0
0
1
0
0
0
4
05
1
6
0
0
0
0
0
1
0
1
0
5
06
2
6
0
0
0
0
0
1
1
0
0
6
07
3
6
0
0
0
0
0
1
1
1
0
7
08
4
6
0
0
0
0
1
0
0
0
0
8
09
5
6
0
0
0
0
1
0
0
1
0
9
10
1
7
0
0
0
1
0
0
0
0
1
0
11
2
7
0
0
0
1
0
0
0
1
1
1
12
3
7
0
0
0
1
1
0
1
0
1
2
13
4
7
0
0
0
1
0
0
1
1
1
3
14
5
7
0
0
0
1
0
1
0
0
1
4
15
1
8
0
0
0
1
0
1
0
1
1
5
16
2
8
0
0
0
1
0
1
1
0
1
6
17
3
8
0
0
0
1
0
1
1
1
1
7
A1
5
1
0
0
1
1
0
0
0
1
3
1
A2
5
2
0
0
1
1
0
0
1
0
3
2
A3
5
3
0
0
1
1
0
0
1
1
3
3
A4
4
8
0
0
1
1
0
1
0
0
3
4
A5
5
8
0
0
1
1
0
1
0
1
3
5
state
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