AMIS-53000 Datasheet, PDF (58/99 Pages) AMI SEMICONDUCTOR – Frequency Agile Transceiver

AMIS-53000 Frequency Agile Transceiver
Data Sheet
Data Rate- Can be specified in the discrete data rate register, or specified as a 16-bit word for a user defined data rate. (See
Section 7.1.3)
RF Frequency- The RF frequency of the transmitter must be configured. (See section 6.4.1)
Output Power- Sets the RF output level for the AMIS-53000.
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-53000 will transmit when the use ID bit in general options A is enabled.
Global is used to transmit to all devices, chip ID will transmit the transmitters 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 MICS 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 MICS channel.
Clear Channel Assessment: When one of the CCA modes of operation are enabled, the AMIS-53000 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
5
Force MICS
Channel
1
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
MICS 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
AMI Semiconductor – Aug. 05, Rev. 1.0
58
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