Datasheet

Section 10 Serial Communication Interface
Rev. 6.00 Aug 04, 2006 page 366 of 680
REJ09B0145-0600
Table 10.6 Examples of BRR Settings for Various Bit Rates (Asynchronous Mode) (2)
OSC
10 MHz 16 MHz
Bit Rate
(bit/s) n N
Error
(%) n N
Error
(%)
110 2 88 –0.25 2 141 0.03
150 2 64 0.16 2 103 0.16
200 2 48 –0.35 2 77 0.16
250 2 38 0.16 2 62 –0.79
300 — — — 2 51 0.16
600 — — — 2 25 0.16
1200 0 129 0.16 0 207 0.16
2400 0 64 0.16 0 103 0.16
4800 — — — 0 51 0.16
9600 — — — 0 25 0.16
19200 — — — 0 12 0.16
31250 0 40070
38400 — —————
Notes: 1. The setting should be made so that the error is not more than 1%.
2. The value set in BRR is given by the following equation:
N=
OSC
(64 × 2
2n
× B)
— 1
where
B: Bit rate (bit/s)
N: Baud rate generator BRR setting (0 ≤ N ≤ 255)
OSC: Value of φ
OSC
(Hz)
n: Baud rate generator input clock number (n = 0, 2, or 3)
(The relation between n and the clock is shown in table 10.7.)
Table 10.7 Relation between n and Clock
SMR Setting
n Clock CKS1 CKS0
0 φ 00
0 φ
W
/2
*
1
/φ
W
*
2
01
2 φ/16 1 0
3 φ/64 1 1