1996 Nov 21

4

Philips Semiconductors

Product specification

DTMF/modem/musical-tone generators

PCD3311C; PCD3312C

5

BLOCK DIAGRAM

handbook, full pagewidth

MGG543

DAC

HIGH

DAC

LOW

SWITCHED

CAPACITOR

BANDGAP

VOLTAGE

REFERENCE

DIVIDER

SELECTION

(ROM)

HIGH

GROUP

DIVIDER

LOW

GROUP

DIVIDER

INPUT

CONTROL

LOGIC

OSCILLATOR

CLOCK

GENERATOR

3

4

12

11

10

9(8)

8(7)

5

7(6)

1(3)

2(4)

14(2)

13(1)

(5)6

OSCI

OSCO

ADDER

VDD

VSS

TONE

A0

D5

MODE

D4

D3

D2

D1/SDA

D0/SCL

STROBE

SWITCHED

CAPACITOR

RESISTOR

CAPACITOR

PCD3311C

PCD3312C

Fig.1 Block diagram.

The un-parenthesised numbers are for the PCD3311CP, those in parenthesis for the PCD3312C.

6

PINNING INFORMATION

6.1

Pinning PCD3311CP

handbook, halfpage

PCD3311CP

MGG508

1

2

3

4

5

6

7

8

14

13

12

11

10

9

OSCI

OSCO

MODE

D5

STROBE

TONE

A0

D0/SCL

D1/SDA

D2

D3

D4

VSS

VDD

Fig.2 Pin configuration PCD3311CP.

6.2

Pin description PCD3311CP

SYMBOL

PIN

TYPE

DESCRIPTION

OSCI

1

I

oscillator input

OSCO

2

O

oscillator output

MODE

3

I

mode select input (selects

D5

4

I

parallel data input

STROBE

5

I

strobe input (for loading

data in parallel mode)

TONE

6

O

frequency output (DTMF,

modem, musical tones)

A0

7

I

slave address input (to be

D0/SCL

8

I

parallel data input or

D1/SDA

9

I

parallel data input or

D2

− D4

10

− 12

I

parallel data inputs

13

P

negative supply

14

P

positive supply