saa5250 NXP Semiconductors, saa5250 Datasheet - Page 21

• Manufacturer Part Number: saa5250
• Description: Interface For Data Acquisition And Control For Multi-standard Teletext Systems
• Manufacturer: NXP Semiconductors

Philips Semiconductors
January 1987
handbook, full pagewidth
Interface for data acquisition and control
(for multi-standard teletext systems)
0
SET DATA GROUP IN
PROGRESS FLAG
SYNCHRONIZING
DATA GROUP IN
PROGRESS
PACKET
Fig.7 NABTS acquisition flow chart.
0
1
1
21
FAST
DECREMENT FORMAT COUNTER.
WRITE DATA BYTES INTO FIFO
LOAD FORMAT COUNTER
WRITE PS BYTE INTO FIFO
WRITE CI BYTE INTO FIFO
WITH IMPLICIT FORMAT
INITIALIZE CIDAC
CODE DETECT
SAVE CI BYTES
COUNTER = 0
SLOW/FAST
FRAMING
FORMAT
A1 O.K.
A2 O.K.
A3 O.K.
MODE
1
1
1
1
0
SLOW
0
0
0
0
1
MGH082
Product specification
SAA5250