Silan

Semiconductors

SC9102C/D

HANGZHOU SILAN MICROELECTRONICS CO.,LTD.

Rev: 2.0

2001-11-02

6

(continued)

Pin No.

Pin Name

Description

13

XMUTE

*Mute output pins.

*NMOS open drain output structure.

*The output is in “LOW” state during dialing sequence (both Pulse and Tone mode)

otherwise this pin is “high-impedance”.

*Long (continue) Mute.

11

VSS

*Negative power supply pin.

10

VDD

*Positive power supply pin.

5

HKS

*Hook switch input pin.

*When the handset is in ON-HOOK state, this pin must be pulled “high” in order to

disable the dialing operation and decrease the power consumption.

*When in OFF-HOOK state, the

operation.

14

PO

*Pulse output signal pin.

*NMOS open drain output structure.

*The output is “LOW” during pulse dialing and Flash operation, otherwise this output

is “floating”.

12

TONE

*Dual Tone Multi-frequency output pin.

*In TONE mode, when an entry of digit key (include *, # key), this pin will send out a

corresponding DTMF signal.

*The TONE pin provides minimum tone duration and minimum intertone pause time

to support rapid key-in. If key-in time is less than 100ms, DTMF signal will last for

100ms; otherwise the tone duration will last as long as the key is pressed.

MODE

Dialing mode

Pulse mode

Open

Pulse mode

7MODE

*Mode selection pin.

*Three-state input structure.

*This pin can select the three

modes shown on the right.

Tone mode

6

M/B

*M/B ration selection pin. (The function seeing the Dialing signal option table)