TDA5150 Datasheet, PDF (25/106 Pages) Infineon Technologies AG – On-chip, high resolution fractional-N synthesizer and Sigma-Delta modulator with ASK, FSK, GFSK options

TDA 5150
TDA 5150 Functional Description
2.4.3.4 Transmit Command
The Transmit Command Byte is used for data transmission. It precedes the datagram
to be transmitted. The Transmit Command Byte format is described in the following
table:
C1
C0
Transmit Command Configuration
Bit Function
Value, description
1
1
A
Data sync 0: off
1: on (at the same time Bit C - Encoding
must be set also to 1 -->int. Encoding)
1
1
B
PA mode 0: PA off at the falling edge of EN
(synchronized with bit-rate if bit A is high)
1: SDIO/DATA is latched at the falling
edge of EN, PA stays on, TX data are kept
constant. After the time-out of 65536 / f_sys
which is ~5 ms for a 13 MHz crystal, PA
and PLL are switched off.
1
1
C
Encoding 0: off
1: on (selects SFR register for encoding
Bit A must be also set to1 -->Data sync)
1
1
D
Pwr. level/ 0: selects PowerLevel/Modulation Setting1
ModSetting ^{1: selects Power Level/Modulation Setting2}
1
1
<E,F> Frequency 0 (00): selects frequency channel A
selection 1 (01): selects frequency channel B
2 (10): selects frequency channel C
3 (11): selects frequency channel D
(for description of frequency channels
A..D programming see
Chapter 2.4.11.3 Channel Hopping)
Note: After the last configuration bit for a new transmission was sent, a break of at least
100 µs must be provided in order to achieve PLL settling and lock on the selected
channel frequency.
Data Sheet
25
V 1.0, July 2009