SC91215 データシートの表示（PDF） - Silan Microelectronics

部品番号

コンポーネント説明

メーカー

SC91215

T/P SWITCHABLE DIALER WITH REDIAL HANDFREE FUNCTION

Silan Microelectronics 

SC91214/91215 SERIES

The INITIAL mode is PULSE mode if the mode selection pin, MODE IN, is VDD or floating. The */T key can

switch the DIALING mode to TONE mode. Unlike NORMAL mode switching, the */T key entry, as the first key

pressed, will not produce any pause time, there are only 31 digits of redial memory available in the buffer to be

used for operation a and b, since the mode switching key, */T, will occupy one digit of space.

3. Manual dialing with automatic access pause

a. Off Hook O P D1 … Dn

Pause key entries can be accepted and stored and stored in the redial memory. Each is stored as a digit.

Each key-in will provide a pause of 3.57 seconds, depending on which model is being used.

4. Redial

a. Off Hook RD or On Hook HFI ↓ RD

Up to 32 digits (in PULSE mode) or 31 digits (in TONE mode) can be dialed using the RD key. The RD key is

disabled while PULSE or TONE signals are being transmitted. Redial will also be inhibited if the last number

dialed exceeds 32 digits because the redial memory can only hold 32 digits.

b. Off Hook RD D1 … Dn or On Hook HFI ↓ RD D1 … Dn

After pressing the RD key, digits may be added to the number in redial memory. When finished dialing, the

redial memory will contain the original digits, plus the digits dialed after pressing RD . each time the redial key is

pressed, the stored number will be dialed exactly the same as it was previously, regardless of the status of the

MODE IN pin.

5. TONE/PULSE switch operation

a. Off Hook D1 … Dn MODE IN pin switched to VSS Dn+1 … Dn+m

PULSE Mode

DTMF Mode

The mode selection pin is always checked for TONE or PULSE mode key entry. Dialing can be switched from

PULSE to TONE mode, but not from TONE to PULSE mode. Switching the MODE IN pin to Vss will cause the

chip to store a */T digit prior to first tone digit in the redial memory and will automatically insert a 2.2 second

pause before the tone digits are dialed out. After the mode has been switched, the status of the mode selection

pin will no longer be checked. Therefore, it will not be possible to switch from TONE to PULSE mode.

b. Off Hook D1 … Dn */T Dn+1 … Dn+m

PULSE Mode

DTMF Mode

PULSE mode is initially defined with the mode selection pin, MODE IN, equal to VDD or floating. At this time,

the mode can be switched to DTMF by pressing the */T key. DTMF mode will being as soon as the last pulse

has been transmitted. In this mode, Dn+1 through Dn+m are sent through the TONE OUT pin as DTMF

signals. If a P key entry is contained in the series of digits before or after the */T entry, or the MODE IN switch

is depressed, 2.2 second pause will be added to the automatically inserted pause time, which is also 3.57

seconds. Both of the above switching modes can store as many as 31 digits in the redial memory.

6. One-key redialing

Off-Hook D1 … Dn RD or On Hook HFI ↓ D1 … Dn RD

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

Http: www.silan.com.cn

REV:1.0 2004.08.03

Page 9 of 16

Share Link: