AMIS-53000 Datasheet, PDF (86/99 Pages) AMI SEMICONDUCTOR – Frequency Agile Transceiver

AMIS-53000 Frequency Agile Transceiver
Data Sheet
7.2.8. SOF Byte
Table 102: Suggested SOF
Modulation
Detector
AM
RSSI
FM (<20kbps) PLL
FM (>20kbps) FFT
Coding
NRZ
Manchester
1 0 pattern
NRZ
Manchester
Preamble
CW
CW
1 0 pattern
Repeating 1/0
All 1’s or 0’s
SOF
55 (HEX)
0A (HEX)
Not required
Not required
55 (HEX) or AA (HEX)
Depending on whether the mode of operation is AM or FM, NRZ or Manchester, it may be necessary for a SOF byte to precede the
chip ID. This byte is user programmable, and is used to ensure proper CDR operation and bit alignment prior to reception of the chip
ID. When the contents of the SOF byte register are loaded to any non-zero value, this byte will be transmitted prior to the chip ID. For
modes not requiring the SOF byte, setting this register to 00h will prohibit transmission of this byte. More information on when the SOF
byte is required is in the clock and data recovery section.
7.2.9. Timing Diagrams for Various Packet Framing Modes
7.2.9.1. Use ID Enabled, No CRC, No Packet Length
Table 103: Receive
Parameter Action
ID
Data interface immediately ready after ID detected
No LOP
Radio stays in RX until instructed to change
Data is shifted out data port as received
No CRC Error checking is not performed and CRC is not attached to packet
Table 104: Transmit
Parameter Action
Transmit Transmit command immediately powers the transmitter on
Transmits preamble
ID
Transmits the ID
Starts data interface and uses a synchronous clock to clock in the TX data (master only)
Transmits each bit as received
Transmitter returns to standby after transmission complete
AMI Semiconductor – Aug. 05, Rev. 1.0
86
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