¡ Semiconductor

ML7005

6/24

Pin

Symbol

Type

Description

25

I

DTAI

Inverting input pin for operational amplifier used for adjusting the transmit output

level of the DTMF signal generator. The non-inverting input of this amplifier is

internally connected to SG. See the figure 11 for adjusting the transmit signal level.

When this amplifier is not used, the DTAO pin should be shorted to the DTAI pin.

26

O

DTAO

Output pin for operational amplifier used for adjusting the transmit output level of

the DTMF signal generator.

27

O

FXDO

Digital output pin for FAX signal (FX) detector.

When a 1300 Hz signal is input to the FXDIM, this pin is "1".

When a call progress tone (CPT) is received (CPD0="1"), this pin is forced to be "0".

When the DOEN register is "0", this pin is fixed at "0".

28

I

FXDIM

Inverting input pin for input amplifier used for detecting the FAX signal (FX).

See the figure 9 for adjusting the receive signal level.

When the FX detector is not used, the FXDIM pin should be shorted to the FXDIO pin.

29

O

FXDIO

Output pin for input amplifier used for detecting the FAX signal (FX).

30

I

CPDIP

Non-inverting input pin for input amplifier used for detecting the CPT.

See the figure 8 for adjusting the receive signal level.

When the CPT detector is not used, see the figure 10.

31

I

CPDIM

Inverting input pin for input amplifier used for detecting the CPT.

32

O

CPDIO

Output pin for input amplifier used for detecting the CPT.