CYP RXC User Manual Page 24

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CYRF6936
Document #: 38-16015 Rev. *F Page 24 of 39
Mnemonic TX_CRC_MSB_ADR Address 0x18
Bit 7 6 5 4 3 2 1 0
Default - - - - - - - -
Read/Write R R R R R R R R
Function TX CRC MSB
Bits 7:0 Calculated CRC16 MSB. The MSB of the CRC16 that was calculated for the last transmitted packet. This value is only valid
after packet transmission is complete.
Mnemonic RX_CRC_LSB_ADR Address 0x19
Bit 7 6 5 4 3 2 1 0
Default 1 1 1 1 1 1 1 1
Read/Write R R R R R R R R
Function RX CRC LSB
Bits 7:0 Received CRC16 LSB. The LSB of the CRC16 field extracted from the last received packet. This value is valid whether or not
the CRC16 field matched the calculated CRC16 of the received packet.
Mnemonic RX_CRC_MSB_ADR Address 0x1A
Bit 7 6 5 4 3 2 1 0
Default 1 1 1 1 1 1 1 1
Read/Write R R R R R R R R
Function RX CRC MSB
Bits 7:0 Received CRC16 MSB. The MSB of the CRC16 field extracted from the last received packet. This value is valid whether or not
the CRC16 field matched the calculated CRC16 of the received packet.
Mnemonic TX_OFFSET_LSB_ADR Address 0x1B
Bit 7 6 5 4 3 2 1 0
Default 0 0 0 0 0 0 0 0
Read/Write R/W R R R R R R R
Function STRIM LSB
Bits 7:0 The least significant 8 bits of the synthesizer offset value. This is a 12-bit 2’s complement signed number which may be used to
offset the transmit frequency of the device by up to ±1.5 MHz. A positive value increases the transmit frequency, and a negative
value reduces the transmit frequency. A value of +1 increases the transmit frequency by 732.6 Hz; a value of –1 decreases the
transmit frequency by 732.6 Hz. A value of 0x0555 increases the transmit frequency by 1 MHz; a value of 0xAAB decreases
the transmit frequency by 1 MHz. Typically, this register is loaded with 0x55 during initialization. Typically this feature is used to
avoid the need to change the synthesizer frequency when switching between TX and RX. As the IF = 1 MHz the RX frequency
is offset 1 MHz from the synthesizer frequency; therefore, transmitting with a 1 MHz offset allows the same synthesizer fre-
quency to be used for both transmit and receive.
Synthesizer offset has no effect on receive frequency.
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