AMIS-53050 Datasheet, PDF (65/107 Pages) AMI SEMICONDUCTOR – Frequency Agile Transceiver

AMIS-53050 Frequency Agile Transceiver
Data Sheet
Peak Deviation- The FM deviation must be set for FM operation (see section 6.4.1.5 and 6.4.1.6)
TX Config- Options for the transmitter must be set.
Preamble- Set a reasonable length of preamble to insure that the receiver can detect the signal.
6.6.1. TX Config
General options for transmit.
AM_FM_TX: Used to set the mode for transmit
Shaping: When enabled, the FSK transitions are digitally shaped in the fractional N PLL with a pre-programmed sequence.
The filter for the shaping is Gaussian with a BT=1. This reduces the high frequency content of the data waveform that
modulates the carrier.
ID for TX: This option specifies which ID the AMIS-53050 will transmit when the use ID bit in general options A is enabled.
Global is used to transmit from one node to all devices. Chip ID will transmit from one node to only those devices that have
the same chip ID
Buffered TX: When this option is enabled in conjunction with use ID and LOP enable, the packet for transmission is loaded
into internal RAM prior to the RF being enabled.
Force Multi-Channel: When this bit is set to 1, bits[7:4] of Status2 can be written to force the transmitter to operate on a
specific channel of the nine channels defined by the multi-channel configuration (this feature can operate on any RF frequency
if the ROM2REGS command has been used to create nine channels).
Clear Channel Assessment: When one of the CCA modes of operation are enabled, the AMIS-53050 will enable its receiver
to first check for the presence of energy on the specified channel before transmitting.
Table 45: TX Config - 0X0F [15]
Bit Name
State
11
7,6 _{Clear channel}
assessment
10
01
00
1
5
Force channel
0
1
4
Smooth turn on
0
3
NU
1
2
ID for TX
0
1
1
Shaping
0
1
0
AM_FM_TX
0
Comment
Not allowed
Multi-channel assessment (pre-defined channels)
Single clear channel assessment prior to transmit (any frequency)
No clear channel assessment performed, normal operation
Enable smooth power up of PA (reduces the spurious response of the TX on
power up)
Use the defined chip ID from the chip ID register
Use the defined global ID from the chip ID register
Gaussian FM data shaping enabled
FM data shaping disabled
AM transmit mode
FM transmit mode
6.6.2. Output Power
C_POWER: Coarse output power control for the power amplifier. When set high, the max out is 15dBm - when set low, the
max output is 0dBm.
F_POWER: Fine output power control for the PA. These seven bits control the voltage on the RFPWR pin via an internal
DAC.F_POWER conversion output voltage.
AMI Semiconductor – Jan. 07, M-20639-002
65
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