Hitachi H8/3937 Series Hardware Manual page 285

Table 10-7 Relation between n and Clock
n Clock
0 ø
0 ø
2 ø/16
3 ø/64
Notes: 1. ø /2 clock is selected in active (medium- and high-speed) or sleep (medium- and high-
W
speed) mode.
2. ø clock is selected in subactive or subsleep mode. SCI3 can be used only when the
W
ø /2 is selected as the CPU clock in subactive or subsleep mode.
W
Table 10-8 shows the maximum bit rate for each frequency. The values shown are for active
(high-speed) mode.
Table 10-8 Maximum Bit Rate for Each Frequency (Asynchronous Mode)
OSC (MHz)
0.0384*
2
2.4576
4
10
16
Note: * When SMR is set up to CKS1 = 0, CKS0 = 1.
Table 10-9 shows examples of BRR settings in synchronous mode. The values shown are for
active (high-speed) mode.
1 2
/2* /ø *
W W
Maximum Bit Rate (bit/s)
600
31250
38400
62500
156250
250000
SMR Setting
CKS1
0
0
1
1
Setting
n
0
0
0
0
0
0
CKS0
0
1
0
1
N
0
0
0
0
0
0
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