¡ Semiconductor
ML7005
PIN DESCRIPTION
Pin
1
Symbol
DTRIO
Type
O
Description
Output pin for DTMF signal receiver input amplifier.
See the figure 8 for adjusting the receive signal level. See the figure 10 when the
DTMF signal receiver is not used.
Inverting input pin for DTMF signal receiver input amplifier.
Non-inverting input pin for DTMF signal receiver input amplifier.
Output pin for signal ground.
The output voltage is half of V
DD
.
Connect SG and GND by a 1 µF capacitor.
This pin goes to a high impedance state when in power down mode.
Output pin for amplifier used for adjusting the transmit output level of CPT
(Call Progress Tone) 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 CPAO pin should be shorted to the CPAI pin.
Inverting input pin for amplifier used to adjust the transmit level of the CPT signal
generator.
Analog output pin for CPT signal generator.
The tone amplitude is approximately - 3 dBm. The transmit signal level can be
changed by using the CPAO and CPAI pins. See the figure 11 for adjusting the
transmit signal level. Control the ON/OFF of CPT transmission by using CPGC of
the control register.
Input pin for selecting the processor mode.
This selection determines the functions of
READ, CS,
ALE,
WR,
D1 and D0 pins.
When this pin is "1", the Intel processor mode is selected. When this pin is "0", the
Motorola processor mode (MSM7524-compatible) is selected. This pin should be
fixed at "0" or "1".
Power supply pin.
Input pin for controlling the power down mode.
When this pin is set to "1", the entire LSI enters the power down mode and each
functional operation stops. The DC level of the analog output pin becomes undefined.
The digital output pins (FXD0, CPD0) and status register indicate a non-detection
state. At that time, the control register CR and DTMF transmit register DTMFT are
cleared. ("0" is written)
The internal circuits (timer, etc. for each detector) also are reset.
After turning on the power, set this pin to "1" to reset the LSI before using this LSI.
When this pin is set to "0", the normal operation starts.
X1 and X2 are connected to a 3.579545 MHz crystal.
See "Oscillation Circuit" of the FUNCTIONAL DESCRIPTION for reference.
3.579545 MHz clock output pin. This pin can drive one ML7005 device.
2
3
4
DTRIM
DTRIP
SG
I
I
O
5
CPAO
O
6
7
CPAI
CPTGO
I
O
8
PTYPE
I
9
10
V
DD
PD
—
I
11
12
13
X1
X2
CLKO
I
O
O
4/24
OKI [ OKI ELECTRONIC COMPONETS ]
