AMIS-53000 Datasheet, PDF (47/99 Pages) AMI SEMICONDUCTOR – Frequency Agile Transceiver

AMIS-53000 Frequency Agile Transceiver
Data Sheet
Status2 also contains information on the reason an interrupt was issued to the external host. The CCA channel status bits provide
information back to the host on which channel within the MICS band is being used for communication. After a CCA enabled
transmission, these bits will be set to indicate which channel was used. For MICS enabled receivers performing multi-channel Sniff,
these bits are used to indicate the channel upon which either energy or an entire packet was found.
If CCA is enabled for operation other than MICS, bit 0 (CCA failed) is used to indicate whether or not the channel is clear. The flags will
be reset when the register is read.
Table 30: Status/Flag2 - 0X02 [2]
Bit
Name
State
7:4
CCA Channel
[3:0]
111
110
101
3:1
Interrupt Type 100
011
010
001
000
1
0
Busy
0
Comment
Indicates channel selected during CCA
RX CRC failed
Receive energy dwell timer timed out
CCA failed
Transmit complete
Buffer data for TX
Data has been received
Housekeeping
Low battery
AMIS-53000 is busy
6.4.5.3. Software State
Displays the current mode of the AMIS-53000. This status register can be used to monitor the activity of the AMIS-53000.
Table 31: Software State - 0X3C [60]
Bit Name
State
7:0 ^{Software State}
1111
1011
1010
1001
1000
0111
0110
0101
0100
0011
0010
0001
0000
Comment
Undetermined
Startup
Copying ROM data to registers
Calibrating LNA
Calibrating PLL
Calibrating 10kHz oscillator
Calibrating Quick Start (kicker) oscillator
Reading EE data
Writing EE data
Idle
Transmitting
Receiving
Standby
6.5 Receiver
The AMIS-53000 receiver is designed for either on/off shift key (AM) modulated signals or frequency shift key (FM) modulated signals.
The receiver includes all the circuitry to recover data from either the OOK or the FSK modulated signal carrier. The receiver operates
on fixed frequencies in the operating frequency range of 300 to 928MHz using an internal fractional N PLL to set the frequency. The
receiver can reduce power consumption using the Sniff Mode to acquire the incoming signal. The receiver can set a user defined fixed
threshold for data detection or it can form a threshold from the incoming signal for determining the presence of signal and the state of
the recovered waveform. The receiver can use a synchronous data detector to extract the data clock and the data from the incoming
signal (FSK modulation always uses this method of data detection).
OOK modulation (AM)
o Manchester encoding option
o CDR data detection option (recommended that this be used)
o Common data rates from 1.2kbps to 19.2kbps or user defined
FSK/GFSK modulation (FM)
AMI Semiconductor – Aug. 05, Rev. 1.0
47
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