Philips Semiconductors
Product specification
Self Tuned Radio (STR)
TEA5757; TEA5759
READING DATA
WRITING DATA
While WRITE-ENABLE is LOW data can be read by the
microcontroller. At a rising edge of the BUS-CLOCK, data
is shifted out of the register. This data is available from the
point where the BUS-CLOCK is HIGH until the next rising
edge of the BUS-CLOCK occurs (see Fig.3).
While WRITE-ENABLE is HIGH the microcontroller can
transmit data to the TEA5757; TEA5759 (hard mute is
active). At a rising edge of the BUS-CLOCK, the register
shifts and accepts one bit into LSB. At clock LOW the
microcontroller writes data (see Fig.4).
To read the entire shift register 24 clock pulses are
necessary.
To write the entire shift register 25 clock pulses are
necessary.
handbook, full pagewidth
WRITE-ENABLE
data read
BUS-CLOCK
DATA
data available
MBE817
data available after search ready
MSB is LOW
data shift
Fig.3 Read data.
handbook, full pagewidth
WRITE-ENABLE
BUS-CLOCK
DATA
MBE818
data shift
data change
Fig.4 Write data.
10
1999 Aug 26
NXP [ NXP ]
