RL78/G1H
CHAPTER 18 RF TRANSCEIVER
Page 613 of 920
Supplemental explanation 2. Special receive mode
• Preamble part
- Operates to receive the pattern which is set in the preamble setting register as a preamble pattern.
(1 byte or 2 bytes)
- The number of bytes which is set by the number-of-preamble-byte setting bit is defined as a repetitive pattern.
• SFD part
- The pattern which is set in the SFD setting register is defined as the source data for checking the SFD match.
(1 byte, 2, or 4 bytes)
- The number of bytes which is set by the number-of-SFD-byte setting bit is defined as the source data for
checking the SFD match.
• PHR part
- Stores the received PHR part (the 2 bytes of data immediately after the SFD) to the mode switch frame
receive register.
The bit 0 (corresponds to MODESW bit) and bit 4 (corresponds to DW bit) of the first byte of PHR can be
received only “0s”.
- Receives data regardless of the MODESW bit value.
- Ignores the received frame length.
• Receive data part
- Stores the receive data part (the 3rd byte and subsequent data immediately after the SFD) to the receive
RAM.
- Generates the bank receive completion interrupt upon every completion of receiving the receive RAM bank.
- Generates the number-of-received-byte interrupt when receiving the number of bytes which is set in the-
number-of-receive-byte interrupt compare register.
- Enables the generation of the receive byte interrupt for every single bit of the receive data after the SFD.
- The number of bytes stored in the receive RAM can be checked by the receive data count register.
• CRC part
- The automatic CRC function does not operate.
- Perform the CRC calculation by using software in order to check the CRC data when it is added to the final
data part.
• End of reception
- Terminate the reception by using the RF communication stop bit.
Содержание RL78/G1H
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