SDA5650 Datasheet, PDF (34/41 Pages) Siemens Semiconductor Group – VPS / PDC-plus Decoder

SDA 5650/X
5.6 BDSP 8/30 Format 1 Bit Allocation
Byte No.
012
13
14
15
Weight
2^–2 2^–1 2⁰
16
MJD Digit
Weight 10⁴
17
MJD Digit
Weight 10²
18
MJD Digit
Weight 10⁰
19
UTC Hours
Units
20
UTC Minutes
Units
21
UTC Seconds
Units
22
23
24
25
Bit No.
3 4 5 67
Weight
2¹ 2² 2³
11
Sign
0
1
11
MJD Digit
Weight 10³
MJD Digit
Weight 10¹
UTC Hours
Tens
UTC Minutes
Tens
UTC Seconds
Tens
Contents
Network Identification
Network Identification
Time Offset Code
1. Byte
2. Byte
Modified Julian Date (MJD)
1. Byte
Modified Julian Date
2. Byte
Modified Julian Date (MJD)
3. Byte
Universal Time Coordinated
(UTC)
1. Byte
Universal Time Coordinated
2. Byte
Universal Time Coordinated
3. Byte
Short Programme Label 1. Byte
Short Programme Label 2. Byte
Short Programme Label 3. Byte
Short Programme Label 4. Byte
Note: This corresponds to the coding adopted in CCIR teletext system B BDSP 8/30
format 1.
NB: The received bytes are output on the I²C Bus in a transparent way, i.e., on a
bit-first-in-first-out basis. No bit manipulation is performed on the chip in this
operating mode.
Concerning bytes no. 16 through 21: When evaluating the numbers, note that
each 4-bit-digit has been incremented by one prior to transmission, and the least
significant bits are transmitted first.
Semiconductor Group
34
02.97