Datasheet

RL78/L12 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0330EJ0200 Rev.2.00 495
Dec 13, 2013
Table 12-3. Baud Rate Setting for UART Reception in SNOOZE Mode
High-speed On-chip
Oscillator (f
IH)
Baud Rate for UART Reception in SNOOZE Mode
Baud Rate of 4800 bps
Operation Clock
(f
MCK) SDRmn[15:9]
Maximum
Permissible Value
Minimum Permissible
Value
32 MHz ± 1.0%
Note
fCLK/2
5
105 2.27% −1.53%
24 MHz ± 1.0%
Note
fCLK/2
5
79 1.60% −2.18%
16 MHz ± 1.0%
Note
fCLK/2
4
105 2.27% −1.53%
12 MHz ± 1.0%
Note
fCLK/2
4
79 1.60% −2.19%
8 MHz ± 1.0%
Note
fCLK/2
3
105 2.27% −1.53%
6 MHz ± 1.0%
Note
fCLK/2
3
79 1.60% −2.19%
4 MHz ± 1.0%
Note
fCLK/2
2
105 2.27% −1.53%
3 MHz ± 1.0%
Note
fCLK/2
2
79 1.60% −2.19%
2 MHz ± 1.0%
Note
fCLK/2 105 2.27% −1.54%
1 MHz ± 1.0%
Note
fCLK 105 2.27% −1.57%
Note When the accuracy of the clock frequency of the high-speed on-chip oscillator is ±1.5% or ±2.0%, the
permissible range becomes smaller as shown below.
• 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 permissible value and minimum permissible value are permissible values for the baud rate in
UART reception. The baud rate on the transmitting side should be set to fall inside this range.
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