RL78/G1H CHAPTER 18 RF TRANSCEIVER
R01UH0575EJ0120 Rev. 1.20 Page 583 of 920
Dec 22, 2016
(16) CSMA control register 1 (BBCSMACON1)
This register controls the CSMA-CA operation.
The NB bit is used to set the macMaxCSMABackoff value. (Initial value is 0H)
The CW bit is used to set the CW value. (Initial value is 2H)
The BBCSMACON1 register consists of 8 bits and can be accessed (serial interface communication) in 8 bit
unit.
Reset signal generation sets this register to 20H.
Figure 18 - 22 CSMA Control Register 1 (BBCSMACON1) Format
Caution Be sure to clear bits 3, 6 and 7 to “0”.
Address:
0012H
After reset: 20H R/W
Symbol76543210
BBCSMA
CON1
0 0 CW1 CW0 0 NB2 NB1 NB0
CW1, CW0 CW value
NB[2:0] The macMaxCSMABackoff value
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