Notes: The value set in BRR is given by the following equation:
OSC
N=
— 1
(8 × 22n × B)
where
B: Bit rate (bit/s)
N: Baud rate generator BRR setting (0 ≤ N ≤ 255)
OSC: Value of øOSC (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
0
0
2
3
Clock
ø
øW/2*1/øW*2
CKS1
CKS0
0
0
1
1
0
1
0
1
ø/16
ø/64
Notes: 1. øW/2 clock is selected in active (medium- and high-speed) or sleep (medium-
and high-speed) mode.
2. øW clock is selected in subactive or subsleep mode. SCI3 can be used only
when the øW/2 is selected as the CPU operation clock in subactive or subsleep
mode.
286
ETC [ ETC ]
