Texas Instruments EUROTEXT CF70200 Manual page 16

UNIVERSAL TELETEXT DECODERS 'EUROTEXT'
'EUROTEXT' CF70200 CF70200
Data Transfer from EUROTEXT
The decoder status, received teletext data, and other data, is transmitted by EUROTEXT when the
bus master places a 'start condition' on the bus and sends the bus address with the R/W bit set to 1
(hex 23). The transfer can consist of any number of bytes and the bus master can terminate the
transmission by placing a 'start' or 'stop' condition on the bus after not acknowledging the last byte.
During the transfer, EUROTEXT will continue to send data as long as the bus master acknowledges
each byte and continues to issue clock pulses.
Handshaking
2
Handshaking is carried out on a byte by byte level as described in the I C specification. When
2
EUROTEXT is not available for servicing the I C but requests are made of it, it extends the low
period of the SCL clock by holding the SCL line low.
2
I C Bus General Call Address
Eurotext does not acknowledge the general call address.
14
DRAFT 11
15-Feb-96 1Q96