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TW2802

TW2802/4 Multiple Video Decoder For Security Applications

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TW2804/TW2802 Multiple Video Decoder

Preliminary

System Control Pins

Name

Number

RSTB

2

CLK54I

89

CLK27O

88

TEST

1

HSPB

110

HCSB

109

HALE

107

HRDB

106

HWRB

104

HDAT [7:0]

91,92,94,95,

97,98,100,101

IRQ

103

Type

I

I

O

I

I

I

I

I

I

I/O

O

Description

System reset.

54MHz system clock input.

27MHz Clock output.

Test pin. Connect to ground.

Select Serial/Parallel host interface.

Chip select for parallel interface.

Slaver address [0] for serial interface.

Address line enable for parallel interface.

Serial clock for serial interface.

Read enable for parallel interface.

Ground for serial interface.

Write enable for parallel interface.

Ground for serial interface.

Data bus for parallel interface.

HDAT [7] is serial data for serial interface.

HDAT [6:1] is slaver address [6:1] for serial

interface. HCSB is slaver address [0].

Interrupt request by video loss and Motion

detection

Power/Ground Pins

Name

Number

VDD

9,21,33,48,60,

72,90,102

VDDO

6,24,45,

66,84,105

3,12,15,18, 27,

30,36,39,42,51,

VSS

54,57,63,69,75,

78,81,87,93,96,

99,108

VDDA

112,119,120,127

VSSA

115,116,123,124

VDDAD

111

VSSAD

128

Type

Description

P

Digital power for internal logic. 2.5V.

P

Digital power for output driver. 3.3V.

G Digital ground.

P

Analog power. 2.5V.

G Analog ground.

P

Analog digital power. 2.5V.

G Analog digital ground.

Techwell, Inc.

7

www.techwellinc.com

09/09/2003

Datasheet Rev. 2.4

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