HD6475328-CP10 Datasheet, PDF (273/459 Pages) Hitachi Semiconductor – original Hitachi CMOS microcomputer unit (MCU)

Table 14-4 Examples of BRR Settings in Synchronous Mode
Bit
Rate
100
250
500
1K
2.5M
5K
10K
25K
50K
100K
250K
500K
1M
2.5M
2
n
N
——
1
249
1
124
0
249
0
99
0
49
0
24
0
9
0
4
——
0
0
XTAL Frequency (MHz)
4
8
10
n
N
n
N
n
N
——————
2
124 2
249 — —
1
249 2
124 — —
1
124 1
249 — —
0
199 1
99 1
124
0
99 0
199 0
249
0
49 0
99 0
124
0
19 0
39 0
49
0
9
0
19 0
24
0
4
0
9
——
0
1
0
3
0
4
0
0
0
1
——
0
0
——
16
n
N
——
3
124
2
249
2
124
1
199
1
99
0
199
0
79
0
39
0
19
0
7
0
3
0
1
20
n
N
——
——
——
——
1
249
1
124
0
249
0
99
0
49
0
24
0
9
0
4
——
0
0
Notes:
Blank: No setting is available.
—: A setting is available, but the bit rate is inaccurate.
B = OSC/[8 × 2²ⁿ × (N + 1)]
B:
N:
OSC :
n:
Bit rate
BRR value (0 ≤ N ≤ 255)
Crystal oscillator frequency in MHz
Internal clock source (0, 1, 2, or 3)
The meaning of n is given by the table below:
n
CKS1 CKS0 Clock
0
0
0
ø
1
0
1
ø/4
2
1
0
ø/16
3
1
1
ø/64
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