MSM6889GS-K データシートの表示（PDF） - Oki Electric Industry

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MSM6889GS-K

Multi-Function Telecommunication LSI

Oki Electric Industry 

¡ Semiconductor

MSM6889

Pin Number

Name

I/O

RS

GS

Description

PB tone transmit enable.

18

3

TEN

I* PBG1 to PBG4 data are latched at the falling edge of TEN, and PB

tone is generated at digital "0" level. (See Fig. 7.)

Modem transmit serial data input.

19

4

TD

I* Data stream less than 300 bps should be input.

Digital "1" and "0" correspond to "Mark" and "Space" respectively.

20

6

RS

Request to send data input .

I*

While RS is at digital "0" level, modem transmit is enabled.

21

7

DG

— Digital Ground, 0 V.

Input used to select call progress tone (CPT) detect output

22

8

ICT1

I*

waveform. (See Fig. 9.)

23

9

ICT2

I* Used to check performance characteristics of the IC.

24

11

ICT3

I* Independent of operating mode. Leave these pins open.

25

12

MODE1

I*

Inputs used to specify operating mode.

26

13

MODE2

I*

(See Table 1.)

27

14

MODE3

I*

28

16

X1

3.579545 MHz crystal resonator should be connected to X1 and X2.

I

When applying external clock to the device, it should be connected

to X2 through the AC coupling capacitor of 100 pF and X1 has to be

29

17

X2

O

open.

30

19

CLK

O 3.579545 MHz clock output.

Modem receive serial data output.

31

20

RD

O Digital "1" and "0" correspond to "Mark" and "Space" respectively.

When CD (Carrier Detect) is off, RD is hold at "Mark" state.

32

22

CD

Carrier Detect output.

O

Digital "0" and "1" represent "Detect" and "No-detect" respectively.

* Digital input pulled up by a high resistance inside the IC.

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