SDA5642-6 Datasheet, PDF (14/27 Pages) Siemens Semiconductor Group – VPS-Decoder

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