SDA5648 데이터 시트보기 (PDF) - Siemens AG

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SDA5648

Decoder for Program Delivery Control and Video Program System PDC / VPS Decoder

Siemens AG 

SDA 5648

SDA 5648X

Description of DAVN and EHB Outputs

DAVN (Data Valid active low)

EHB (First Field active high)

Signal Output

DAVN

H/L-transition

(set low)

L/H-transition

(set high)

always set high

EHB

L/H-transition

H/L-transition

VPS Mode

PDC Mode

8/30/2

8/30/1

in line 16 when

valid VPS data is

received

in the line

carrying

valid

8/30/2 data

in the line

carrying

valid

8/30/1 data

at the start of

line 16

at the beginning of the next field

i.e.,at the start of the next data entry window

on power-up or

during I2C-Bus accesses when the bus master doesn’t

acknowledge in order to generate the stop condition

at the beginning of the first field

at the beginning of the second field

In test mode (i.e. TI = high), both DAVN and EHB are controlled by the CS0 pin and reproduce the

state of the CS0 input.

Semiconductor Group

31

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