SDA5649X Siemens, SDA5649X Datasheet - Page 14

• Manufacturer Part Number: SDA5649X
• Description: Expanded Decoder for Program Delivery Control and Video Program System EPDC / VPS Decoder
• Manufacturer: Siemens

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
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
VPS Mode
in line 16
when valid
VPS data is
received
at the start of
line 16
on power-up or
during I
acknowledge in order to generate the stop condition
at the beginning of the first field
at the beginning of the second field
2
C-Bus accesses when the bus master doesn’t
57
8/30/2 Mode
in the line
carrying
valid
8/30/2 data
at the beginning of the next field
i.e.,at the start of the next data entry window
8/30/1
Mode
in the line
carrying
valid
8/30/1 data
PDC Mode
Header
Time
in the line
carrying
valid
header
row X/0
data
SDA 5649X
SDA 5649