SC7461-104 Просмотр технического описания (PDF) - Silan Microelectronics
Номер в каталоге
Компоненты Описание
производитель
SC7461-104 Datasheet PDF : 14 Pages
| |||
Silan
Semiconductors
SC7461
There is no order of priority given in key input. This means that keys designated for the double keying operation
may be pressed in any sequence. When two keys (designated for the double key operation) are pressed
simultaneously, a series of pulse is outputted according to each key input. Pressing other keys that are NOT
intended for the double key operation do NOT generate any output.
The Key Matrix is given in the following diagram.
KO0 KO1 KO2 KO3 KO4 KO5 KO6 KO7
0 4 8 12 16 20 24 28
KI0
1 5 9 13 17 21 25 29
KI1
2 6 10 14 18 22 26 30
KI2
3 7 11 15 19 23 27 31
KI3
FIGURE 2. KEY MATRIX
3.DOUBLE KEY OPERATION
Double Key Operation is useful for tape deck recording operation. The following table shows the Key Data
corresponding to the double keys pressed. Also refer to the Key Input Section.
Key
D0
D1
D2
D3
D4
D5
D6
D7
K20+K21
1
0
1
0
1
1
0
0
K20+K22
0
1
1
0
1
1
0
0
K20+K23
1
1
1
0
1
1
0
0
NOTE: Key Data--D6 and D7 may be preset to "0", "1" by mask option.
Key 20
(H=Key-ON)
Key 21
Key 22
TraKnDsemyati2as0sionTKraenyDs2ma0tias&s2i1onTraKnDsemyati2as1sionTranSstmopisssionTraKnDsemyati2as2sion
Key 20&22
Transmission
Data
FIGURE 3. TRANSMISSION DATA DIAGRAM
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 2.2 2002-02-28.
5
Share Link: 