Datasheet

Section 10 Serial Communication Interface
Rev. 6.00 Aug 04, 2006 page 370 of 680
REJ09B0145-0600
Notes: The value set in BRR is given by the following equation:
N=
OSC
(8 × 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 10.10.)
Table 10.10 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
Notes: 1. φ
W
/2 clock is selected in active (medium- and high-speed) or sleep (medium-
and high-speed) mode.
2. φ
W
clock is selected in subactive or subsleep mode. SCI3 can be used only
when the φ
W
/2 is selected as the CPU operation clock in subactive or subsleep
mode.