MSM6889RS データシートの表示（PDF） - Oki Electric Industry

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MSM6889RS

Multi-Function Telecommunication LSI

Oki Electric Industry 

¡ Semiconductor

MSM6889

Pin Number

RS

GS

33

23

34

25

35

26

36

27

37

28

38

30

39

31

40

—

41

32

42

34

Name

CP

PB1

PB2

PB3

PB4

SP

PON

NC

VD2

VD

I/O

Description

Call progress tone (CPT) detect output.

O When a CPT is detected, the waveform selected by ICT1 is output.

(See Fig. 9. )

O

Receive PB tone code outputs.

O

The output impedance of these pins becomes high except when the

O

device operates as PB tone receiver. (See Fig. 7 and Fig. 8. )

O

PB tone receive data present.

O Digital "1" represents that this pin is receiving the PB tone.

(See Fig. 8. )

Power down mode select. Digital "1" on this pin puts the whole

I

circuit of the device into the power down state.

— No connection.

Power supply for digital interface output.

The supply voltage from +2.5 V to VD is possible for VD2. For

example, when the device interfaces to the MCU working on +3 V

supply, the +3 V supply has to be applied to the VD2 pin.

—

Note that this function is effective to all of digital output pins

except X1, X2, and CLK.

There is no restriction regarding the power supplies (VD and VD2)

applying procedure.

+5 V power supply (digital circuit).

When power is turned on or the power down mode is released, the

—

device must be put into the PB tone transmit mode or PB tone

detect mode.

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