RL78/G1H CHAPTER 18 RF TRANSCEIVER
R01UH0575EJ0120 Rev. 1.20 Page 620 of 920
Dec 22, 2016
(52) Preamble length setting register (BBPAMBL)
This register is used to set the preamble length upon transmission. Set value over values shown in Table 18
- 2 and Table 18 - 3.
The BBPAMBL register is set by the serial interface in 8-bit units.
Reset signal generation sets this register to 0004H.
Figure 18 - 65 Preamble Length Setting Register (BBPAMBL) Format
Caution Be sure to clear bits 10 to 15 to “0”.
(53) Frequency setting register (BBFREQ)
This register is used to set frequency. This register consists of 30 bits.
The value ranged from 100 MHz to 1000 MHz can be set in 1 Hz step. Initial value: 36FC3BA0H = 922.5
MHz.
BBFREQ register is set via serial interface in 8-bit units.
Reset signal generation sets this register to 36FC3BA0H.
Figure 18 - 66 Frequency Setting Register (BBFREQ) Format
Caution Be sure to clear bits 30 and 31 to “0”.
For details, see 18.7.2 (2) RF frequency setting for transmission and 18.7.2 (3) RF frequency setting for
reception.
Address:
00A7H, 00A6H
After reset: 0004H R/W
Symbol 15 14 13 12 11 10 9 8
BBPAMBL000000PAMBLLEN9PAMBLLEN8
76543210
PAMBLLEN7 PAMBLLEN6 PAMBLLEN5 PAMBLLEN4 PAMBLLEN3 PAMBLLEN2 PAMBLLEN1 PAMBLLEN0
PAMBLLEN[9:0] Preamble length setting value
Address: 00ABH to 00A8H After reset:
36FC3BA0H
R/W
Symbol 31 30 29 28 27 26 25 24
BBFREQ 0 0 FREQ29 FREQ28 FREQ27 FREQ26 FREQ25 FREQ24
23 22 21 20 19 18 17 16
FREQ23 FREQ22 FREQ21 FREQ20 FREQ19 FREQ18 FREQ17 FREQ16
15 14 13 12 11 10 9 8
FREQ15 FREQ14 FREQ13 FREQ12 FREQ11 FREQ10 FREQ9 FREQ8
76543210
FREQ7 FREQ6 FREQ5 FREQ4 FREQ3 FREQ2 FREQ1 FREQ0
FREQ[29:0] Frequency setting value
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