Sony CXD2131Q Datasheet

Description

The CXD2131Q is an IC that encodes and decodes video aspect ratio identification signal (conforming to EIAJ Standard CPX-1204) in the vertical blanking interval of an NTSC video signal.

Features

• The processing formerly carried out by the two

chips CXA1727Q and CXD2122AQ has been

consolidated into this one chip.

• Both microcomputer serial interface and I2C

interface functions are built in.

Applications

Wide-screen televisions, VCRs, MUSE-NTSC converters

Structure

Silicon gate CMOS IC

Absolute Maximum Ratings

• Supply voltage VDD VSS – 0.5 to +7.0 V

• Input voltage VI VSS – 0.5 to VDD + 0.5 V

• Output voltage VO VSS – 0.5 to VDD + 0.5 V

• Storage temperature

Tstg –55 to +150 °C

Recommended Operating Conditions

• Supply voltage VDD 4.5 to 5.5 V

• Operating temperature

Topr –20 to +70 °C

– 1 –

CXD2131Q

E94Z26-ST

Video Aspect Ratio Identification Signal Encoder/Decoder

Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.

32 pin QFP (Plastic)

For the availability of this product, please contact the sales office.

– 2 –

CXD2131Q

Block Diagram

15

27

28

29

30

VCR 4-line Serial

Interface

Timing Signal

Generator

Decoder

CRCC Check

Data Validity

Criterion

Encoder

1/4

Frequency

Divider

Sync Separator

Chip Clamp

Pedestal

Clamp

Data Slicer

Sync Separator

Chip Clamp

Pedestal

Clamp

Data Slicer

20

21

2

10

11 12

13

17

18

31

32

16

6

7

3

4

9

I2C Bus Interface

14

2

14

CRCC-OK

VALID

141214

2 2

Internal clock

O164

OLBX

CRCO

SROT

XCS SCLK

SRIN

SCL

SDA

MCON

CSYC

VIN11

VIN12

VIN21

VIN22

VIN3

VOUT

I164

PRTC/ILBX

SELXT

XO

XI

– 3 –

CXD2131Q

Pin Description

Analog ground. Clock fsc/4 fsc switching; 4 fsc at 1. Oscillator connection (fsc or 4 fsc). Oscillator connection or clock input. Digital ground. Encoder input; 16:9 at 1, 4:3 at 0.

Fixed to 0 when not used. Microcomputer interface switching; 0 = I2C, 1 = serial.

[Encoder input; 1 = letter-box, 0 = normal]. Digital system power supply. Microcomputer interface exists; 1 = yes, 0 = no. Serial interface output to microcomputer [fixed to 0]. Select from microcomputer [encoding exists; 1 = yes]. Clock from microcomputer [decoder input channel switching]. Data from microcomputer [decoder line ±1 existence]. Standby and reset at 0. CRCC check monitor output. Composite Sync monitor output. I2C bus clock. I2C bus data. Digital ground. Decoder output; 1 = letter-box, 0 = normal. Decoder output; 16:9 at 1, 4:3 at 0 (decode slicer output). Test input; normally connected to Vss; when 1, Pin 21

switches to the function in parentheses ( ). Test input; connect to Vss. Analog bias current setting. Analog bias current setting. Analog system power supply. Sync separation input. Decoder data slicer input. Sync separation input. Decoder data slicer input. Encoder input. Encoder output.

1 2 3 4 5

6

7 8

9 10 11 12 13 14 15 16 17 18 19 20 21

22 23

24 25 26 27 28 29 30 31 32

AVSS SELXT XO XI VSS

I164

PRTC [ILBX] VDD

MCON SROT XCS [OE] SCLK [ISEL] SRIN [LNJ1] XRST CRCO CSYC SCL SDA VSS OLBX O164 (DTHI)

TST1 TST2

ISET1 ISET2 AVDD VIN11 VIN12 VIN21 VIN22 VIN3 VOUT

—

I

O

I

—

I

—

I

I/O

I I I

I O O

I

I/O

—

O O

I

—

I

I O

ANALOG TTL CMOS CMOS —

TTL

TTL —

TTL TTL

∗1

TTL TTL TTL TTL

∗2

CMOS CMOS CMOS

∗2

CMOS

∗2, 4

— CMOS CMOS

TTL

∗3

TTL

∗3

ANALOG ANALOG ANALOG ANALOG ANALOG ANALOG ANALOG ANALOG ANALOG

Pin No.

Symbol I/O I/O level Description

∗1

Three-state ∗2Schmitt input ∗3With pull-down resistor ∗4Open drain

Note 1) In microcomputer-free mode when MCON = 0, Pin 7 and Pins 10 to 13 switch to the functions in

parentheses [ ]. At this time connect SROT (Pin 10) to Vss.

Note 2) When TST1 = 1, Pin 21 switches to the function in parentheses ( ).

– 4 –

CXD2131Q

Electrical Characteristics

DC Characteristics (Logic Section) (VDD = 5.0V, VSS = 0V, Ta = 25°C)

Item

Symbol

Condition Min. Typ. Max. Unit Remarks

Output voltage

Input voltage

Input leak current

Output leak current

Current consumption

VOH VOL VOH VOL VOL VIH VIL VIH VIL VIH VIL

II

IOZ

IDD

IOH = –2mA IOL = 4mA IOH = –3mA IOL = 3mA IOL = 4mA

VIN = either VSS or VDD

VDD – 0.8

VDD/2

2.2

0.7 × VDD

0.8 × VDD

–10

–40

15

0.4

VDD/2

0.4

0.8

0.3 × VDD

0.2 × VDD +10

+40

V V V V V V V V V V V

µA

mA

Except for Pins 3 and 18

Pin 3 only

Pin 18 only Except for

Pins 4, 17 and 18

Pin 4 only

Pins 17 and 18 only

Except for Pins 4, 10, 22 and 23

Pin 10 only Sum of

Pins 8 and 26

AC Characteristics (VDD = 5.0V, VSS = 0V, Ta = 25°C)

Item

Symbol

Condition Min. Typ. Max. Unit Remarks

Clock frequency

Serial transmission clock frequency

fxi

fsclk

SELXT (Pin 2) = VSS SELXT (Pin 2) = VDD

MCON (Pin 9) = VDD PRTC (Pin 7) = VDD

3.58

14.3

5.0

20.0

10

MHz MHz

MHz

Pin 4 input, or oscillator between Pins 3 and 4

Pin 12 Duty ratio = 50%

I/O Pin Capacitance

Item

Symbol

Condition Min. Typ. Max. Unit Remarks

Input pin

Output pin Input/output

pins

CIN

COUT

CI/O

VDD = VI = 0V, f = 1MHz

9

11

pF