SDA5650X Siemens, SDA5650X Datasheet - Page 11

• Manufacturer Part Number: SDA5650X
• Description: VPS / PDC-plus Decoder
• Manufacturer: Siemens

Control Register:
Bit Number: 7
Default: All bits are set to 0 on power-up.
Bits 4 through 7 are used for test purposes and must not be changed for normal
Bit 0:
0
BDSP 8/ 30/ 2 data accessible
Bit 1:
0
VPS mode active
Bit 2:
0
BDSP 8/30/1 data accessible
Bit 3:
0
Mode A: header bytes in order 38-45,
30-37
Semiconductor Group
T4
operation by user software!
determines, which kind of data is accessed via the I
mode is active:
determines the operating mode:
determines whether BDSP 8/30/1-data or header row data is
accessible:
determines mode of teletext header access:
6
T3
5
T2
Value
Value
Value
Value
4
T1
11
1
BDSP 8/ 30/ 1 or header row
data accessible (refer to description of
Bit 2)
1
PDC mode active
1
Bytes of teletext header in mode A or B
(see Bit 3)
1
Mode B: header bytes in order 22-29,
14-21
3
MAB
2
HDT
2
1
PDC/
VPS
C Bus when PDC
SDA 5650/X
0
FOR1/
FOR2
02.97