Renesas RL78/G1H User Manual

RL78/G1H CHAPTER 14 SERIAL ARRAY UNIT
R01UH0575EJ0120 Rev. 1.20 Page 424 of 920
Dec 22, 2016
(2) Baud rate error during transmission
The baud rate error of UART (UARTq) communication during transmission can be calculated by the
following expression. Make sure that the baud rate at the transmission side is within the permissible baud
rate range at the reception side.
Here is an example of setting a UART baud rate at f
CLK = 32 MHz.
Remark m: Unit number (m = 0, 1), n: Channel number (n = 2), mn = 02, 12, q: UART number (q = 1, 3)
(Baud rate error) = (Calculated baud rate value) ÷ (Target baud rate) ×100 −100 [%]
UART Baud Rate
(Target Baud Rate)
f
CLK = 32 MHz
Operation Clock (f
MCK) SDRmn[15:9] Calculated Baud Rate Error from Target Baud Rate
300 bps
f
CLK/2
9
103 300.48 bps +0.16%
600 bps
f
CLK/2
8
103 600.96 bps +0.16%
1200 bps
f
CLK/2
7
103 1201.92 bps +0.16%
2400 bps
f
CLK/2
6
103 2403.85 bps +0.16%
4800 bps
f
CLK/2
5
103 4807.69 bps +0.16%
9600 bps
f
CLK/2
4
103 9615.38 bps +0.16%
19200 bps
f
CLK/2
3
103 19230.8 bps +0.16%
31250 bps
f
CLK/2
3
63 31250.0 bps ±0.0%
38400 bps
f
CLK/2
2
103 38461.5 bps +0.16%
76800 bps f
CLK/2 103 76923.1 bps +0.16%
153600 bps f
CLK 103 153846 bps +0.16%
312500 bps f
CLK 50 312500 bps ±0.39%

Renesas RL78/G1H Specifications

General

Brand	Renesas
Model	RL78/G1H
Category	Microcontrollers
Language	English