TUA6024-2 Infineon Technologies Corporation, TUA6024-2 Datasheet - Page 17

• Manufacturer Part Number: TUA6024-2
• Description: 2 Band Tv Tuner Mixer-oscillator-pll With Balanced If-amplifier
• Manufacturer: Infineon Technologies Corporation

TUA6024-2
Functional Description
line to LOW (acknowledge condition). The first byte is comprised of seven
address bits. These are used by the processor to select the PLL from several
peripheral components (chip select). The LSB bit (R/W) determines whether
data are written into (R/W = 0) or read from (R/W = 1) the PLL.
In the data portion of the telegram during a WRITE operation, the MSB bit of the
first or third data byte determines whether a divider ratio or control information
is to follow. In each case the second byte of the same data type has to follow
the first byte.
If the address byte indicates a READ operation, the PLL generates an acknowl-
edge and then shifts out the status byte onto the SDA line. If the processor gen-
erates an acknowledge, a further status byte is output; otherwise the data line
is released to allow the processor to generate a stop condition. The status word
consists the lock flag and the power-on flag.
Four different chip addresses can be set by appropriate DC level at pin AS (
see
).
Table 5-6 Address selection on page 31
While applying the supply voltage, a power-on reset circuit prevents the PLL
from setting the SDA line to LOW, which would block the bus. The power-on
reset flag POR is set at power-on and when V
falls below 3.2 V. It will be reset
CC
at the end of a READ operation.
Wireless Components
3 - 10
Specification, July 2001