Renesas rl78 ユーザーズマニュアル
RL78/G1A
CHAPTER 12 SERIAL ARRAY UNIT
R01UH0305EJ0200 Rev.2.00
523
Jul 04, 2013
Table 12-3. UART Reception Baud Rate Setting in the SNOOZE Mode
UART Reception Baud Rate Setting in the SNOOZE Mode
Baud Rate 4800 bps
High-speed On-
chip Oscillator (f
IH
)
Operation
Cock
(f
MCK
)
SDRmn
[15:9]
Maximum
Permissible
Value
Minimum
Permissible
Value
32 MHz
± 1.0%
Note
f
CLK
/2
5
105 2.27%
−1.53%
24 MHz
± 1.0%
Note
f
CLK
/2
5
79 1.60%
−2.18%
16 MHz
± 1.0%
Note
f
CLK
/2
4
105 2.27%
−1.53%
12 MHz
± 1.0%
Note
f
CLK
/2
4
79 1.60%
−2.19%
8 MHz
± 1.0%
Note
f
CLK
/2
3
105 2.27%
−1.53%
6 MHz
± 1.0%
Note
f
CLK
/2
3
79 1.60%
−2.19%
4 MHz
± 1.0%
Note
f
CLK
/2
2
105 2.27%
−1.53%
3 MHz
± 1.0%
Note
f
CLK
/2
2
79 1.60%
−2.19%
2 MHz
± 1.0%
Note
f
CLK
/2 105 2.27%
−1.54%
1 MHz
± 1.0%
Note
f
CLK
105
2.27%
−1.57%
Note The allowable range is narrowed as described below when the accuracy of the high-speed on-
chip oscillator clock frequency is ±1.5% or
±2.0%.
-
In the case of f
IH
± 1.5%, perform (Maximum permissible value − 0.5%) and (Minimum
permissible value + 0.5%) to the values in the above table.
-
In the case of f
IH
± 2.0%, perform (Maximum permissible value − 1.0%) and (Minimum
permissible value + 1.0%) to the values in the above table.
Remark The maximum and minimum allowable values indicate the allowable baud rate values for
UART reception.
Specify the baud rate so that the baud rate on the transmission side is within this range.