SDA5642-6 查看數據表（PDF） - Siemens AG

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SDA5642-6

VPS-Decoder

Siemens AG 

SDA 5642-6/X

2.4 Description of DAVN and EHB Outputs

DAVN (Data Valid active low)

EHB (First Field active high)

Signal Output

VPS Mode

DAVN

H/L-transition

(set low)

L/H-transition

(set high)

always set high

in line 16 when valid VPS data is received

at the start of line 16

on power-up or during I2C-Bus accesses when the

bus master doesn’t acknowledge in order to

generate the stop condition

EHB

L/H-transition

H/L-transition

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

14

02.97

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