SC9302DT Ver la hoja de datos (PDF) - Silan Microelectronics

Número de pieza

componentes Descripción

Fabricante

SC9302DT

1-MEMORY/2-MEMORY TONE/PULSE DIALER

Silan Microelectronics 

Silan

Semiconductors

SC9302 Series

11. DOUT BCD CODE

When dialing, the corresponding 4-bit BCD codes are serially presented on DOUT from MSB to LSB. The data of

the DOUT is valid at the falling edge of the CLOCK pin. The following table lists the BCD codes corresponding to the

keyboard input.

Key-In

1

2

3

4

5

6

7

BCD Code

0001

0010

0011

0100

0101

0110

0111

Key-In

8

9

0

*/T

#

F

P

BCD Code

1000

1001

1010

1101

1100

1011

1110

12. LOCK FUNCTION

The function aims to detect locked dialing number to prevent a long distance call. The dialing output of the chip is

disabled if the first input key after on-off-hook is the locked number when the lock function is enabled. The lock

function selection is listed below.

The SC9302X version is the pin-selected type; on the other hand, the SC9302XLT is the key-board operated type.

However, the SC9302XT version does not support any lock function.

• SC9302X VERSION

LOCK Pin

OPEN

VDD

Vss

Function

Normal dialing (no lock)

“0, 9” is inhibited

“0” is inhibited

• SC9302XLT VERSION

RK31

No

No

Yes

Yes

RK41

No

Yes

No

Yes

Function

Keyboard operated IDD lock

Lock 0

Lock 0,9

All keys are locked

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0 2001-11-01

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