Datasheet MSM7575GS-BK Datasheet (OKI)

E2U0025-29-82

¡ Semiconductor

This version: Aug. 1999

Previous version: Jan. 1998

MSM7575

Multi-Function PCM CODEC

GENERAL DESCRIPTION

The MSM7575, developed for advanced digital cordless telephone systems, is a single channel full duplex CODEC which performs mutual transcoding between the analog voice band signal and the 64 kbps PCM serial data. This device performs DTMF tone and several kinds of tone generation, transmit/receive data mute and gain control, side-tone pass and its gain control, and VOX function. Using advanced circuit technology, this device operates from a single 3 V power supply and provides low power consumption.

FEATURES

••

• Single 3 V Power Supply Operation VDD: 2.7 V to ␣ 3.6 V

••

• Transmit/Receive Full-Duplex Single Channel Operation

••

• Transmit/Receive Synchronous Mode Only

••

• PCM Interface Data Format :

••

• Serial PCM Transmission Data Rate : 64 kbps to 2048 kbps

••

• Low Power Consumption

•• Operating Mode : 24 mW Typ. (V Power-Down Mode : 0.03 mW Typ. (V

••

• Two Analog Input Amplifier Stages: Externally Gain Adjustable

••

• Analog Output Stage

••

• Master Clock Frequency : 9.600/19.200 MHz Selectable

••

• Transmit/Receive Mute, Transmit/Receive Programmable Gain Control

••

• Side Tone Path with Programmable Attenuation (8-step Level Adjustment)

••

• Built-in DTMF Tone Generator

••

• Built-in Various Ringing Tones Generator

••

• Built-in Various Ring Back Tone Generator

••

• Control by Serial MCU Interface

••

• Built-in VOX Control

•• Transmit side : Voice/Silence Signal Detect Receive side : Background Noise Generation

••

• Built-in Op-amps and Analog Switches for Various Analog Interfaces.

••

• Package:

••

64-pin plastic QFP (QFP64-P-1414-0.80-BK)(Product name : 7575GS-BK)

A-law/µ-law/linear (2's complement) Selectable

= 3.0 V)

DD

= 3.0 V)

DD

Push-pull Drive (direct drive of 350 W␣ + 120 nF)

1/25

2/25

¡ Semiconductor

MSM7575

BLOCK DIAGRAM

AIN2

GSX2

VOXI

PCMSO

Prefilter

+

-

AIN1+

GSX1

AOUT-

BPF

P

/

S

XSYNC

RSYNC

PCMRI

S

/

P

Postfilter

LPF

BCLK

PWI

AOUT+

-1

VFRO

AIN1-

-1

VOXO

Compand

Voice Signal

Detect

A/D

D/A

++

EXCK

PDN/

RESET

MCU Interface

Clock/

Timing

ATT

+

-

+

SAO

-1

ATT

Expand

VREF

+

RINGC

AVIN

REF1

+

-

+

REF2

+

AIN3-

GSX3

AIN3+

+

AIN4-

GSX4

AIN4+

IO1

IO2

SW1

IO3

IO4

SW2

IO5

IO6

SW3

IO7

IO8

SW4

IO9

IO10

SW5

IO11

SW6

IO12

SW7

IO13

SW8

IO14

SW9

V

DD

V

DD

V

DD

MCK

X1

X2

DEN

DOUT

DIN

TOUT1 TOUT2 TOUT3

SGB

SG

AG

DG

V

DD

Tone GEN.

Back ground

Noise Gen.

To each circuit

¡ Semiconductor

PIN CONFIGURATION (TOP VIEW)

MSM7575

VOXO

DOUT

DIN

EXCK

DEN

PCMRI

PCMSO

RSYNC

XSYNC

BCLK

DG

IO1

10

11

12

13

MCKX2NC

64

63

1

2

3

4

5

6

7

8

9

62

NC

61

X1

PDN/RESETNCTOUT3

60

59

58

57

TOUT2

TOUT1

56

55

RINGC

VDD

54

53

REF2

52

REF1

51

AVIN

50

NC

49

48VOXI

47

46

45

44

43

42

41

40

39

38

37

36

AOUT+

AOUT-

PWI

VFRO

SAO

GSX2

AIN2

GSX1

AIN1-

AIN1+

GSX4

AIN4-

AIN4+

14

IO2

15

IO3

16

IO4 AIN3+

NC : No connect pin

17

IO5

18

IO6

19

IO7

20

IO8

21

22

23

24

IO9

IO10

IO11

IO12

64-Pin Plastic QFP

25

IO13

26

IO14

27

NC

28

NC

29

NC

30

SGB

31

SG

32

AG

35

34

33

GSX3

AIN3-

3/25

¡ Semiconductor

MSM7575

PIN AND FUNCTIONAL DESCRIPTIONS

AIN1+, AIN1–, AIN2, GSX1, GSX2

Transmit analog input and the output for transmit gain adjustment. The pin AIN1– (AIN2) connects to the inverting input of the internal transmit amplifier, and the pin AIN1+ connects to the non-inverting input of the internal transmit amplifier. The pin GSX1 (GSX2) connects to output of the internal transmit amplifier. Gain adjustment should be referred to Fig. 1.

VFRO, AOUT+, AOUT–, PWI, SAO, RINGC

Used for the receive analog output and the output for receive gain adjustment. VFRO is an output of the receive filter. AOUT+ and AOUT– are differential analog signal outputs which can directly drive ZL = 350 W + 120 nF or the 1.2 kW load. Gain adjustment should be referred to Fig.

1.

The ORed signal with the control register data CR4-B5 and the external pin RINGC determines the output pins (AOUT+ and AOUT- /SAO+ and SAO-) for the speech signal and an acoustic component of the sounder tone, DTMF tone, R tone, F tone, various kinds of tones at either the VFRO pin or the SAO pin.

Differential

Analog Input

0.1 mF

Vi

10 mF

+

–

Transmit Gain: V = (R2/R1) ¥ (R4/R3)

Receive Gain: Vo/V = 2 ¥ (R6/R5)

= 120 nF

Z

L

+ 350 W

C1

C1 R1

C2

V

R1

R3

GSX2

VFRO

O

R2

R4

/Vi

R5

R6

Differential Analog Output

R2

AIN1–

AIN1+

GSX1

SG AIN2

GSX2

VFRO

PWI

AOUT–

AOUT+

–

+

–

+

–

+

–1

V

REF

to ENCODER

SELECT

from DECODER

from MCU INT.

TOUT1

Sounder Output Signal

SAO

RINGC

+1

Figure 1 Analog Input/Output Interface

+

–

TOUT2

TOUT3

from MCU INT.

4/25

¡ Semiconductor

MSM7575

TOUT1, TOUT2, TOUT3

These are pins for outputs of the NOR gates whose inputs are the comparator output signal between the SAO output level and the SG level, and each register signal stored by the MCU interface. The each output is NOR-gated with the comparator output and the invented signal of CR1-B7 at TOUT3, the inverted signal of CR1-B6 at TOUT2, and the inverted signal of CR1-B5 at TOUT1.

AVIN, REF1, REF2

These pins are for inputs of two comparators internal to the device. AVIN is connected to each non-inverting input of comparator1 and comparator2. REF1 is connected to an inverting input of comparator1 and REF2 is connected to an inverting input of comparator2. The output of each comparator is connected to the input of ENOR. The interval analog switch SW1 is ON/OFF controlled by the output which is the logical OR of the ENOR and the CR5-B7 signal. When CR5B7 is at "0", the SW1 is turned to OFF if AVIN is within the voltage range of REF1 and REF2 and the SW1 is turned to ON if AVIN is out of the voltage range of REF1 and REF2.

AIN3+, AIN3-, GSX3, AIN4+, AIN4-, GSX4

These pins are for inputs and outputs of the internal op-amps. Refer to BLOCK DIAGRAM for the connection.

IO1 to IO14

These pins are for inputs and outputs of the internal analog switch. Refer to BLOCK DIAGRAM and FUNCTIONAL DESCRIPTION for the connection and the control method.

X1, X2

Crystal oscillator connection pins. X2 is for the clock output pin. When a conventional external clock is used, X1 should be connected to the ground, X2 should be left open, and the clock should be input to the MCK pin.

For the use of a self-oscilation circut

MSM7575

X1

X2

MCK

For the use of an external clock

MSM7575

X1

X2

MCK

9.6 MHz or

19.2 MHz

9.6 MHz or

19.2 MHz

Figure 2 Connection to a Crystal Oscillator or an External Clock

5/25

¡ Semiconductor

MSM7575

SG, SGB

Analog signal ground output. The output voltage is about 1.4 V. The bypass capacitors (10 µF in parallel with 0.1 µF ceramic type) should be put between this pin and AG to get the specified noise characteristics. This output voltage is 0 V during power-down.

AG

Analog ground.

DG

Digital ground. This ground is separated from the analog signal ground(AG) in this device. The DG pin must be kept as close to the AG pin possible on the PCB.

V

DD

+3 V power supply.

PDN/RESET

Power down and reset control input. “L” level makes the whole chip enter to power down state, and, at the same time, all of control register data are reset to the initial state. Set this pin to “H” level during normal operating mode. The power down state is controlled by a logical OR with CR0-B5 of the control register. When using the pin PDN/RESET for the power down and reset control, CR0-B5 should be set to digital “0”.

MCK

Master clock input. The frequency must be 9.6 MHz or 19.2 MHz. The applied clock frequency is selected by the control register data CR0-B6. The master clock signal is allowed to be asynchronous with BCLK, XSYNC, and RSYNC.

PCMSO

Transmit PCM data output. This PCM output signal is output from MSB in synchronization with the rising edge of BCLK or XSYNC. A pull-up resistor must be connected to this pin, because this output is configuared as an open drain. During power down, this output is at high impedance state.

6/25

¡ Semiconductor

MSM7575

PCMRI

Receive PCM data input. This PCM input signal is shifted on the falling edge of BCLK and input from MSB.

BCLK

Shift clock input for the PCM data (PCMSO, PCMRI). The frequency is set in the range of 64 kHz to 2048 kHz.

XSYNC

8 kHz synchronous signal input for Transmit PCM data. This signal should be synchronized with BCLK. XSYNC is used for indicating MSB of the transmit serial PCM. Be sure to input the XSYNC signal because it is also used as the input of the timing circuit and the clock source of the tone generator.

RSYNC

8 kHz synchronous signal input for Receive PCM data. This signal should be synchronized with BCLK signal. RSYNC is used for indicating the MSB of the receive serial PCM.

BCLK

XSYNC

PCMSO

RSYNC

PCMRI

MSB LSB

8kHz

(125ms)

Figure 3 PCM Interface Basic Timing Diagram

7/25

¡ Semiconductor

MSM7575

VOXO

Transmit VOX function signal output. VOX function is to recognize the presence or absence of the transmit voice signal by detecting the signal energy. “H” and “L” levels set to this pin correspond to the presence and the absence, respectively. This result appears also at the register data CR7-B7. The signal energy detect threshold is set by the control register data CR6-B6, B5.

VOXI

Signal input for receive VOX function. The “H” level at VOXI indicates the presence of voice signal, the decoder block processes normal receive signal, and the voice signal appears at analog output pins . The “L” level indicates the absence of voice signal, the background noise generated in this device is transferred to the analog output pins. The background noise amplitude is set by the control register CR6. Because this signal is ORed with the register data CR6-B3, the control register data CR6-B3 should be set to digital “0”.

Voice Input GSX2

VOXO

VOXI

Voice Output VFRO

(Absence)

(Presence)

T

VXON

Presence Detect

T

VXOFF

Absence Detect (Hang-over time)

(a) Transmit VOX Function Timing Diagram

(Absence)

(Presence)

Normal Voice Signal Decoded Time period

Background Noise

(b) Receive VOX Function (CR6-B3: digital "0") Timing Diagram

Note: VOXO, VOXI function become valid when setting CR6-B7 to digital “1”.

Figure 4 VOX Function

8/25

¡ Semiconductor

(b)

,

MSM7575

DEN , EXCK, DIN, DOUT

Serial control ports for MCU interface. Reading and writing data is performed by an external MCU through these pins. Total 8 registers with 8 bits are provided on the devices. DEN is the “Enable” control signal input, EXCK is the data shift clock input, DIN is the address and data input, and DOUT is the data output from which inverted data of the contents of the register is output. Fig.5 shows the input or output timing diagram.

DEN

EXCK

W

A2

DIN

A1 A0 B7 B6 B5 B4 B3 B2 B1 B0

DOUT

DEN

EXCK

DIN

DOUT

R A2A1A0

High Impedance

Figure 5 MCU Interface Input/Output Timing

Register map is shown below.

Name

CR0

CR1

CR2

CR3

CR4

CR5

Address

A2 A1 A0

000

001

010

011

100

101

B7 B6 B5 B4 B3 B2 B1 B0

A/m

SEL

TOUT3

-CONT

TX

ON/OFFTXGAIN2TXGAIN1TXGAIN0

Side Tone

GAIN2 DTMF/

OTHERS

SEL SW7-

CONT

High Impedance

(a) Write Data Timing Diagram

B7 B6 B5 B4 B3 B2 B1 B0

Read Data Timing Diagram

Table-1

Control and Detect Data

MCK

SEL

TOUT2

-CONT

Side Tone

GAIN1

TONE

SEND

SW8-

CONT

PDN

ALL

TOUT1

-CONT

Side Tone

GAIN0

SAO/

VFRO

SW9-

CONT

TONE

ON/OFF

TONE4 TONE3 TONE2 TONE1 TONE0

SW5&

SW6-CONT

PDN

TX

— — — — RX PAD

PDN

RX

ON/OFFRXGAIN2RXGAIN1

TONE

GAIN3

SW4-

CONT

— LNR

TONE

GAIN2

SW3-

CONT

TONE

GAIN1

SW2-

CONT

PDN

SAO/AOUT

RX

GAIN0

TONE

GAIN0

SW1-

CONT

R/W

CR6

CR7

110

111

VOX

ON/OFFONLVL1

VOX

OUT

TX NOISE

LVL1

ON

LVL0

TX NOISE

LVL0

IN

RX NOISE

LEVEL SEL

OFF

TIME

—————

VOX

RX NOISE

LVL1

RX NOISE

LVL0

R/W

R

R/W : Enable to read/write R : Read only register.

9/25

¡ Semiconductor

ABSOLUTE MAXIMUM RATINGS

MSM7575

Parameter

Power Supply Voltage

Analog Input Voltage

Digital Input Voltage

Operating Temperature

Storage Temperature

Symbol

V

DD

V

AIN

V

DIN

T

op

T

STG

Condition

—

RECOMMENDED OPERATING CONDITIONS

Parameter

Power Supply Voltage

Operating Temperature Range

Input High Voltage

Input Low Voltage

Master Clock Frequency

Bit Clock Freqency

Synchronous Signal Frequncy

Clock Duty Ratio

Digital Input Rise Time

Digital Input Fall Time

Transmit Sync Signal Setting Time

Receive Sync Signal Setting Time

Synchronous Signal Width

PCM Set-up Time

PCM Hold Time

Digital Output Load

Bypass Capacitors for SG

Symbol

V

DD

Ta

V

IH

V

IL

f

MCK1

f

MCK2

f

BCK

f

SYNC

D

C

t

Ir

t

If

t

XS

t

SX

t

RS

t

SR

t

WS

t

DS

t

DH

R

DL

C

DL

C

SG

Condition

—

MCK, XSYNC, RSYNC, PCMRI,

RINGC, BCLK, VOXI, PDN/RESET, DEN, EXCK, DIN

MCK, XSYNC, RSYNC, PCMRI,

RINGC, BCLK, VOXI, PDN/RESET, DEN, EXCK, DIN

MCK (CR0–B6 = "0")

BCLK

XSYNC, RSYNC

MCK, BCLK, EXCK

MCK, XSYNC, RSYNC, PCMRI,

RINGC, BCLK, VOXI, PDN/RESET, DEN, EXCK, DIN

MCK, XSYNC, RSYNC, PCMRI,

RINGC, BCLK, VOXI, PDN/RESET, DEN, EXCK, DIN

BCLK to XSYNC

XSYNC to BCLK

BCLK to RSYNC

RSYNC to BCLK

XSYNC, RSYNC

—

PCMSO (Pull-up Resistor)

TOUT1, TOUT2, TOUT3,

PCMSO, VOXO, DOUT

SG to AG

Rating

–0.3 to +5

– 0.3 to V

–0.3 to V

DD

+ 0.3

–30 to +85

–55 to +150

Min. Typ. Max. Unit

+2.7

–25

0.45 ¥ V

0

–0.01%

64

—

30

—

100

1 BCLK

100

500

—

10 + 0.1

DD

—

+25

—

9.600

19.200

—

8.0

50

—

+3.6

+70

V

DD

0.16 ¥ V

+0.01%

2048

—

70

50

—

100

—

100

—

DD

Unit

V

°C

V

°C

V

MHz

kHz

%

ns

ms

ns

W

pF

mF

10/25

¡ Semiconductor

ELECTRICAL CHARACTERISTICS

DC and Digital Interface Characteristics

Parameter

Power Supply Current

Input High Voltage

Input Low Voltage

Input Leakage Current

Output High Voltage V

Output Low Voltage

Output Leakage Current

Input Capacitance

Output Resistance

Symbol

I

DD1

I

DD2

V

IH

V

IL

I

IH

I

IL

OH

V

OL

I

O

C

IN

R

OSG

Operating Mode,

Power Down Mode,

VI = V

DD

VI = 0 V

I

0.4 mA

OH =

1 mA

I

OH =

1 LSTTL, Pull-up: 500 W

PCMSO

SG —2550kW

MSM7575

2.7 V to 3.6 V, Ta = –25°C to +70°C)

(V

DD =

Condition

(V

—

DD

3.0 V)

=

3.0 V)

Min.

—

0.45¥V

0.0

—

0.5 ¥ V

0.8 ¥ V

0.0

—

— —5—pF

DD

Typ.

8

0.01

—

0.2

—

Max.

6

0.1

V

DD

0.16¥V

2.0

0.5

V

DD

V

DD

0.4

10

Unit

mA

DD

mA

V

Transmit Analog Interface Characteristics

2.7 V to 3.6 V, Ta = –25°C to +70°C)

(V

DD =

Parameter

Input Resistance

Output Load Resistance

Output Load Capacitance

Output Amplitude

Input Offset Voltage

Symbol

R

INX

R

LGX

C

LGX

V

OGX

V

OFGX

Condition

AIN1+ , AIN1– , AIN2

GSX1, GSX2

GSX1, GSX2, R

= 20 kW

L

Pre–OPAMPs

Min.

10

20

—

–20

*1 –7.7 dBm (600 W) = 0 dBm0, + 3.17 dBm0 = 1.30 VPP (m-law Selected)

Typ.

—

Max.

—

100

1.30 (*1)

20

Unit

MW

kW

pF

V

PP

mV

11/25

¡ Semiconductor

Receive Analog Interface Characteristics

Parameter

Input Resistance

Output Load Resistance

Output Load Capacitance

Output Voltage Level

Offset Voltage

Comparator Input Voltage Range

Analog Switch "ON" Resistance

Symbol

R

INPW

R

LVF

R

LAO

C

LVF

C

LAO

V

OVF

V

OAO

V

OFVF

V

OFAO

G

DB

R

SW

PWI, AIN3+/–, AIN4+/–, REF1,

REF2, AVIN

VFRO, SAO

AOUT+, AOUT–, GSX3, GSX4

VFRO, SAO

AOUT+, AOUT–, GSX3, GSX4

VFRO, SAO AOUT+,

AOUT–, GSX3, GSX4

VFRO, SAO

AOUT+, AOUT– (Gain = 0 dB,

Power amp only)

AVIN, REF1, REF2

IO1-IO2, IO3-IO4, IO5-IO6,

IO7-IO8, IO9-IO10, IO10-IO11,

IO12-

VDD, IO13-

Condition

R

= 20 kW

L

R

= 1.2 kW

L

= 350 kW

Z

L

+ 120 nF(See Fig.1)

GSX3, GSX4

VDD, IO14-

MSM7575

(V

2.7 V to 3.6 V, Ta = –25°C to +70°C)

DD =

Min.

10

20

1.2

—

—— V

–100

–20

0.85 — VDD–0.75 —

100 — 400 W

V

DD

Typ.

—

Max.

—

100

1.30 (*1)

100

20

Unit

MW

kW

pF

V

PP

V

PP

mV

*1 –7.7 dBm (600 W) = 0 dBm0, + 3.17 dBm0 = 1.30 VPP (m-law Selected)

12/25

¡ Semiconductor

AC Chracteristics

Parameter

Transmit Frequency

Response

Receive Frequency

Responce

Transmit Signal

to Distortion Ratio

Receive Signal

to Distortion Ratio

Transmit Gain

Tracking

Receive Gain

Tracking

Idle Channel Noise

Absolute Signal

Amplitude

(V

2.7 V to 3.6 V, Ta = –25°C to +70°C)

DD =

Condition

Symbol

Freq.

Level

Others

Min.

Typ.

(dBm0)(Hz)

L

T1

0 to 60

T2

300 to 3000 –0.15 — 0.20 dB

T3

T4

T5

T6

R1

R2

R3

R4

R5

1020 Reference dB

0

—

3300 –0.15 — 0.80 dB

3400 0 — 0.80 dB

3968.75 13 — — dB

0 to 3000 –0.15 — 0.20 dB

1020 Reference dB

3300 –0.15 — 0.80 dB0

—

3400 0 — 0.80 dB

3968.75 13 — — dB

L

OSS

SD T1 35 —3

SD T2 35 —0

SD T3 35 —–30

1020

(*2)

SD T4

SD T5 23 —–45

SD R1 —3

SD R2 —0

SD R3 —–30

1020

(*2)

SD R4

SD R5 —–45

GT T1 –0.2 0.2

GT T2 Reference

GT T3 1020 –0.2 0.2–40

GT T4 –0.5 0.5

GT T5 –1.2 1.2

GT R1 –0.2 0.2

GT R2 Reference

GT R3 1020 –0.2 0.2

GT R4 –0.5 0.5

GT R5 –1.2 1.2

N

IDLT

———

3

–10

–50

–55

3

–10

–40

–50

–55

AIN = SG

—

(*2)

25

28 —–40

35

28

23

—

(–75.7)

(*2)

N

IDLR

——

—

(*3)

—

(–79.7)

0.320

A

VT

1020

0

GSX2

0.285 (*4)

0.320

A

VR

VFRO

0.285 (*4)

MSM7575

Max.—Unit

dB

—–40

–68

–72

0.359

dB

dBmOp

(dBmp)

Vrms

13/25

¡ Semiconductor

AC Characteristics (Continued)

Parameter

Power Supply Noise

Rejection Ratio

Digital Input/Output

Setting Time

Serial Port Digital

Input/Output Setting

Time

Symbol

P

SRRT

P

SRRR

t

SDX

t

XD1

t

XD2

t

XD3

t

M1

t

M2

t

M3

t

M4

t

M5

t

M6

t

M7

t

M8

t

M9

t

M10

t

M11

F

EXCK

Noise Freq.

: 0 to 50 kHz

Freq.

—

(V

2.7 V to 3.6 V, Ta = –25°C to +70°C)

DD =

Condition

Level Min. Typ. Max. Unit

(dBm0)(Hz)

Others

Noise Level

30——dB

—

: 50 mV

PP

30——dB

200

0—

*5(100)

200

0—

1LSTTL + 100 pF

pull-up: 500 W

See

Fig.4

*5(100)

200

0—

*5(100)

200

0—

*5(100)

50——ns

100 — — ns

See

C

Load

= 100 pF—

Fig.7

50——ns

0 — 50 ns

50——ns

0 — 50 ns

——10MHz—— EXCKShift Clock Frequency

MSM7575

ns

*2 Use the P-message weighted filter *3 PCMRI input code "11010101"(A-law)

"11111111"(m-law) *4 0.320 Vrms = 0 dBm0 = –7.7 dBm *5 Value in ( ) is for C

= 10 pF Pull-up £ 20 kW

Load

Note: All ADPCM coder and decoder characteristics comply with ITU-T Recommendation

G.721.

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¡ Semiconductor

AC Characteristics (DTMF and Other Tones)

Parameter

Frequency Difference

Original (reference)

Tone Signal Level

*6

Relative Level of

DTMF Tones

Symbol

D

V

DTMF Tones –7 — +7 Hz

FT1

Other Tones

FT2

TL

Transmit

TH

RL

Tones

V

Receive

V

Tones

RH

DTMFVTH/VTL

Condition

DTMF (Low) DTMF (High)

and Other Tones

DTMF (Low)

DTMF (High)

and Other Tones

, VRH/V

RL

*6 Not contain the setting value of the programmable gain

2.7 V to 3.6 V, Ta = –25°C to +70°C)

(V

DD =

Min. Typ. Max. Unit

–7—+7Hz

–18

–16

–4

–2

+1 dBm0R

–16

–14

–2

0

+2

MSM7575

–14

–12

+2

+3

dBm0

0

dBm0

AC Characteristics (Programmable Gain Stages)

Parameter

Gain Accuracy

Symbol

D

G

All gain stages, to programmed value –1 0 +1 dB

Condition

AC Characteristics (VOX Function)

Parameter

Transmit VOX Detect Time

(Voice signal ON/OFF detect time

Transmit VOX Detect Level

Accuracy

(Threshold Level)

Symbol

t

VXON

t

)

VXOF

D

VX

Condition

OFF Æ ON — 5 — ms

ON Æ OFF

VOXO,

Fig.4

To the setting of detect level

by CR6-B6, B5.

2.7 V to 3.6 V, Ta = –25°C to +70°C)

(V

DD =

Min. Typ. Max. Unit

(V

2.7 V to 3.6 V, Ta = –25°C to +70°C)

DD =

Min. Typ. Max. Unit

150/310 160/320 170/330 ms

–2.5 dB

0 +2.5

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¡ Semiconductor

TIMING DIAGRAM

Transmit Side PCM Data Interface

MSM7575

BCLK

XSYNC

PCMSO

0

t

XS

12345678910

t

SX

t

XD1

t

WS

XD2

MSB LSB

t

SDX

Receive Side PCM Data Interface

BCLK

RSYNC

PCMRI

0

t

RS

12345678910

t

SR

t

DS

t

WS

t

DH

MSB

Figure 6 PCM Data Interface

LSB

t

XD3

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¡ Semiconductor

Serial Port Data Transfer for MCU Interface

DEN

t

M5

EXCK

t

M2

123456

11 12

MSM7575

t

M10

DIN

DOUT

t

M1tM3

t

M4

M6

t

M7

W/R A2 A1 A0 B7

t

M8

B7

Figure 7 MCU Interface

t

M9

B1 B0

t

M11

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¡ Semiconductor

MSM7575

FUNCTIONAL DESCRIPTION

Control Registers

(1) CR0 (Basic operating mode)

B7 B6 B5 B4 B3 B2 B1 B0

CR0 MCK SEL PDN ALL PDN TX PDN RX — LNR

Initial Value

A/m SEL

00000000

Note) "Initial": Reset state by PDN/RESET B7 ...PCM Companding law select: 0/µ-law, 1/A-law

B6 ...Master clock frequency select: 0/9.600 MHz, 1/19.200 MHz B5 ...Power down (whole system): 0/Power on, 1/Power down

When using this data for power down control, pin PDN/RESET should be set at

“H”level. The control registers are not reset by this signal. B4 ...Power down (Transmit only): 0/Power on, 1/Power down B3 ...Power down (Receive only including the op-amps of GSX3, GSX4 and comparator): 0/

Power on, 1/Power down B2 ...Not used B1 ...PCM interface linear code select:

0/Companding law selected by CR0-B7

1/14-bit Linear code (2's complement) in spite of the value of CR0-B7 B0 ...Power Down for Sounder output amps: (SAO), or Receiver output amp (AOUT, VFRO ):

When this data is set to digital “1”, the circut which is not selected by CR4-B5 are at the

power down state.

When this data is set to digital "0", sounder amplifiers and receiver amplifiers are in the

power-on state.

PDN

SAO/AOUT

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¡ Semiconductor

(2) CR1

B7 B6 B5 B4 B3 B2 B1 B0

CR1

Initial Value

TOUT3

–CONT

00000000

TOUT2

–CONT

TOUT1

–CONT

B7 ... TOUT3 control bit :

0/TOUT3 = "0", 1/Enable TOUT3 B6 ... TOUT2 control bit :

0/TOUT2 = "0", 1/Enable TOUT2 B5 ... TOUT1 control bit :

0/TOUT1 = "0", 1/Enable TOUT1 B4 ... Not used B3 ... Not used B2 ... Not used B1 ... Not used B0 ... Receive side PAD : 1/inserted,12 dB loss

0/no PAD

MSM7575

————RX PAD

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¡ Semiconductor

MSM7575

(3)CR2 (PCM CODEC operational mode setting and transmit/receive gain adjustment)

B7 B6 B5 B4 B3 B2 B1 B0

CR2 TX GAIN2 TX GAIN1 TX GAIN0 RX ON/OFF RX GAIN2 RX GAIN1 RX GAIN0

Initial Value

TX ON/OFF

00110011

B7 ... PCM Coder disable : 0/Enable, 1/Disable (transmit PCM idle pattern) B6, B5, B4 ... Transmit gain adjustment, refer to Table-2. B3 ... PCM Decoder disable : 0/Enable, 1/Disable (receive PCM idle pattern) B2, B1, B0 ... Receive gain setting, refer to Table-2.

Table-2 Transmit/Receive Gain Setting table

B6 B5 B4

000

001

010

011

100

101

110

111

Transmit Gain

–6 dB

–4 dB

–2 dB

0 dB

+2 dB

+4 dB

+6 dB

+8 dB

B2 B1 B0

000

001

010

011

100

101

110

111

Receive Gain

–6 dB

–4 dB

–2 dB

0 dB

+2 dB

+4 dB

+6 dB

+8 dB

This programmable gain table should be assigned, not only for transmit/receive voice signal, but also for the transmitted DTMF and other tones. The transmission of these tone signals are enabled, by the CR4-B6 data described later, The original (reference) signal amplitude of these tones are analogically defined as follows.

DTMF low-group-tones.................................... –16 dBm0/Tone

DTMF high-group-tones and others............... –14 dBm0/Tone

For example, when selecting +8 dB (B6, B5, B4) = (1,1,1) as a transmit gain, each tone signal amplitude with analogical expression on the pin PCMSO becomes as follows .

DTMF low-group tones .................................... –8 dBm0

DTMF high-group tones and other tones ...... –6 dBm0

Gain setting of side tone (path to receive side from transmit side) and receive side tone is performed by register CR3.

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¡ Semiconductor

(4) CR3 (Side tone and other tone generator gain setting)

B7 B6 B5 B4 B3 B2 B1 B0

CR3

Side. Tone

GAIN2 GAIN1 GAIN0 ON/OFF GAIN3 GAIN2 GAIN1

Initial Value

Side. Tone Side. Tone TONE TONE TONE TONE TONE

00000000

B7, B6, B5 ... Side tone path gain setting, refer to Table-3. B4 ... Tone generator enable : 0/Disable, 1/Enable B3, B2, B1, B0 ... Tone generator gain adjustment for receive side, refer to Table-4

Table-3 Side Tone Gain Setting Table

MSM7575

GAIN0

Table-4 Receive Tone Generator Gain Setting Table

B3 B2 B1 B0

0000

0001

0010

0011

0100

0101

0110

0111

B7 B6 B5

000

001

010

011

100

101

110

111

Tone Generator Gain

–36 dB

–34 dB

–32 dB

–30 dB

–28 dB

–26 dB

–24 dB

–22 dB

Side Tone Path Gain

OFF

–21 dB

–19 dB

–17 dB

–15 dB

–13 dB

–11 dB

–9 dB

B3 B2 B1 B0

1000

1001

1010

1011

1100

1101

1110

1111

Tone Generator Gain

–20 dB

–18 dB

–16 dB

–14 dB

–12 dB

–10 dB

–8 dB

–6 dB

The tone generator gain setting table for receive side, shown by Table-4, depends upon the following reference level.

DTMF low-group tones ................................–2 dBm0

DTMF high-group tones and others ............ 0 dBm0

For example, when selecting –6 dB (B3, B2, B1, B0) = (1, 1, 1, 1) as a tone generator gain, each DTMF tone signal amplitude on SAO or VFRO is as follows.

DTMF low-group tone..................................–8 dBm0

DTMF high-group tone or other tones ....... –6 dBm0

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¡ Semiconductor

(5) CR4 (Tone genereator operating mode and frequency setting)

B7 B6 B5 B4 B3 B2 B1 B0

CR4

DTMF/OTHERS

SEL SEND VFRO

TONE SAO/ TONE4 TONE3 TONE2 TONE1 TONE0

MSM7575

Initial Value

00000000

B7 ... DTMF or Other tones select : 0/Others, 1/DTMF B6 ... Tone transmit enable (Transmit side) : 0/Voice signal (transmit), 1/Tone transmit B5 ... Tone output pin select (Receive side) : 0/VFRO, 1/SAO B4, B3, B2, B1, B0 ... Tone frequency setting, referred to Table-5-1, -2.

(a) B7 = 1 (DTMF tone)

Table-5-1

B4 B3 B2 B1 B0

*0000

*0001

*0010

*0011

*0100

*0101

*0110

*0111

Frequency

697 Hz + 1209 Hz

697 Hz + 1336 Hz

697 Hz + 1477 Hz

697 Hz + 1633 Hz

770 Hz + 1209 Hz

770 Hz + 1336 Hz

770 Hz + 1477 Hz

770 Hz + 1633 Hz

B4 B3 B2 B1 B0

*1000

*1001

*1010

*1011

*1100

*1101

*1110

*1111

Frequency

852 Hz + 1209 Hz

852 Hz + 1336 Hz

852 Hz + 1477 Hz

852 Hz + 1633 Hz

941 Hz + 1209 Hz

941 Hz + 1336 Hz

941 Hz + 1477 Hz

941 Hz + 1633 Hz

*Unrelated

(b) B7 = 0 (Other tones)

Table-5-2 Tone Generator Frequency Setting

B4 B3 B2 B1 B0

00000

00001

00010

00011

00100

00101

00110

00111

0 1 0 0 0 400 Hz,20 Hz wamble —

0 1 0 0 1 400 Hz —

0 1 0 1 0 350 Hz + 440 Hz Mix —

0 1 0 1 1 1.5kHz —

0 1 1 0 0 1.8kHz —

0 1 1 0 1 800 Hz —

0 1 1 1 0 1000 Hz —

0 1 1 1 1 1300 Hz —

Frequency

2 k/2.48 kHz, 8 Hz wamble

2 k/2.2 kHz, 8 Hz wamble

2 k/2.48 kHz, 4 Hz wamble

2 k/2.2 kHz, 4 Hz wamble

1 k/1.333 kHz, 8 Hz wamble

2.73 k/2.5 kHz, 8 Hz wamble

1.8 k/2 kHz, 8 Hz wamble

400 Hz,16 Hz wamble

B4 B3 B2 B1 B0 Frequency

10000

10001

10010

10011

10100

10101

10110

10111

11000

11001

11010

11011

11100

11101

11110

11111

2000 Hz

2042 Hz

2514 Hz

500 Hz

667 Hz

1333 Hz

2100 Hz

—

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¡ Semiconductor

Wamble Tone Wave

Tf1 Tf2

4Hz wamble... Tf1 = Tf2 = 125 ms 8Hz wamble... Tf1 = Tf2 = 62.5 ms 16Hz wamble...Tf1 = Tf2 = 31.25 ms 20Hz wamble...Tf1 = Tf2 = 25 ms

(6) CR5 (Analog switch control)

B7 B6 B5 B4 B3 B2 B1 B0

CR5

Initial Value

SW7_

CONT

00000000

SW8_

CONT

SW9_

CONT

SW5&SW6_

CONT

SW4_

CONT

SW3_

CONT

MSM7575

t Repeatative waveform

SW2_

CONT

SW1_

CONT

B7 ... Control Analog switch SW7 between IO12 and VDD :

0/SW7 OFF, 1/SW7 ON B6 ... Control Analog switch SW8 between IO13 and VDD :

0/SW8 OFF, 1/SW8 ON B5 ... Control Analog switch SW9 between IO14 and VDD :

0/SW9 OFF, 1/SW9 ON B4 ... Control Analog switch SW5 between IO9 and IO10, and Analog switch SW6 between IO10

and IO11 :

0/SW5 OFF, SW6 ON, 1/SW5 ON, SW6 OFF B3 ... Control Analog switch SW4 between IO7 and IO8 :

0/SW4 OFF, 1/SW4 ON B2 ... Control Analog switch SW3 between IO5 and IO6 :

0/SW3 OFF, 1/SW3 ON B1 ... Control Analog switch SW2 between IO3 and IO4 :

0/SW2 OFF, 1/SW2 ON B0 ... Control Analog switch SW1 between IO1 and IO2 :

0/SW1 OFF, 1/SW1 ON

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¡ Semiconductor

MSM7575

(7) CR6 (VOX function control)

B7 B6 B5 B4 B3 B2 B1 B0

CR6

Initial Value

VOX

ON/OFF

00000000

ON

LVL1

ON

LVL0

OFF

TIME

VOX IN RX NOISE

LEVEL SEL

RX NOISE

LVL1

RX NOISE

LVL0

B7 ... VOX function enable : 0/Disable, 1/Enable B6, B5 ... Transmit signal energy detect (Transmit VOX) threshold

(0, 0): –30 dBm0 (0, 1): –35 dBm0 (1, 0): –40 dBm0 (1, 1): –45 dBm0

B4 ... Hang-over time (Fig. 2, T

VXOFF)

: 0/160 ms, 1/320 ms

B3 ... Receive VOX function setting : 0/Background noise transmit, 1/Voice signal detect

When using this data for control, the pin VOXI should be set at a “L” level.

B2 ... Background noise amplitude setting : 0/Automatic, 1/Programmable by B1 and B0

Automatic : The noise is set at the voice signal amplitude at the time when B3 (or VOXI) changes from “1” to digital “0”.

B1, B0 ... (0, 0): No noise

(0, 1): –55 dBm0 (1, 0): –45 dBm0 (1, 1): –35 dBm0

(8) CR7 (Detect register, read only)

B7 B6 B5 B4 B3 B2 B1 B0

CR7

Initial

VOX

OUT

000*****

TX NOISE

LVL1

TX NOISE

LVL0

—————

B7 ... Transmit VOX function result : 0/Absence, 1/Presence B6, B5 ... Transmit voiceless level (indicator) :

(0, 0) : below –60 dBm0 Note) These outputs are valid only when VOX (0, 1) : –50 to –60 dBm0 function is enabled by CR6-B7. (1, 0) : –40 to –50 dBm0

(1, 1) : over –40 dBm0 B4 ... Not used B3 ... Not used B2 ... Not used B1 ... Not used B0 ... Not used

For IC test

*

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¡ Semiconductor

PACKAGE DIMENSIONS

QFP64-P-1414-0.80-BK

Mirror finish

MSM7575

(Unit : mm)

Package material Lead frame material Pin treatment Solder plate thickness Package weight (g)

Epoxy resin 42 alloy Solder plating 5 mm or more

0.87 TYP.

Notes for Mounting the Surface Mount Type Package

The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. Therefore, before you perform reflow mounting, contact Oki’s responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times).

25/25

E2Y0002-29-62

NOTICE

1. The information contained herein can change without notice owing to product and/or

technical improvements. Before using the product, please make sure that the information being referred to is up-to-date.

2. The outline of action and examples for application circuits described herein have been

chosen as an explanation for the standard action and performance of the product. When planning to use the product, please ensure that the external conditions are reflected in the actual circuit, assembly, and program designs.

3. When designing your product, please use our product below the specified maximum

ratings and within the specified operating ranges including, but not limited to, operating voltage, power dissipation, and operating temperature.

4. Oki assumes no responsibility or liability whatsoever for any failure or unusual or

unexpected operation resulting from misuse, neglect, improper installation, repair, alteration or accident, improper handling, or unusual physical or electrical stress including, but not limited to, exposure to parameters beyond the specified maximum ratings or operation outside the specified operating range.

5. Neither indemnity against nor license of a third party’s industrial and intellectual property

right, etc. is granted by us in connection with the use of the product and/or the information and drawings contained herein. No responsibility is assumed by us for any infringement of a third party’s right which may result from the use thereof.

6. The products listed in this document are intended for use in general electronics equipment

for commercial applications (e.g., office automation, communication equipment, measurement equipment, consumer electronics, etc.). These products are not authorized for use in any system or application that requires special or enhanced quality and reliability characteristics nor in any system or application where the failure of such system or application may result in the loss or damage of property, or death or injury to humans. Such applications include, but are not limited to, traffic and automotive equipment, safety devices, aerospace equipment, nuclear power control, medical equipment, and life-support systems.

7. Certain products in this document may need government approval before they can be

exported to particular countries. The purchaser assumes the responsibility of determining the legality of export of these products and will take appropriate and necessary steps at their own expense for these.

8. No part of the contents contained herein may be reprinted or reproduced without our prior

permission.

9. MS-DOS is a registered trademark of Microsoft Corporation.

Printed in Japan

Datasheet MSM7575GS-BK Datasheet (OKI)

Specifications and Main Features

Frequently Asked Questions

User Manual