HD6473228P10V Datasheet, PDF (189/301 Pages) Renesas Technology Corp – Regarding the change of names mentioned in the document, such as Hitachi Electric and Hitachi XX, to Renesas Technology Corp

Table 9-4. Examples of BRR Settings in Synchronous Mode
XTAL Frequency (MHz)
Bit 2
4
8
10
16
20
rate n N n N n N n N n N n N
100 — — — — — — — — — — — —
250 1 249 2 124 2 249 — — 3 124 — —
500 1 124 1 249 2 124 — — 2 249 — —
1k 0 249 1 124 1 249 — — 2 124 — —
2.5k 0 99 0 199 1 99 1 124 1 199 1 249
5k 0 49 0 99 0 199 0 249 1 99 1 124
10k 0 24 0 49 0 99 0 124 0 199 0 249
25k 0 9 0 19 0 39 0 49 0 79 0 99
50k 0 4 0 9 0 19 0 24 0 39 0 49
100k — — 0 4 0 9 — — 0 19 0 24
250k 0 0* 0 1 0 3 0 4 0 7 0 9
500k
0 0* 0 1 — — 0 3 0 4
1M
0 0* — — 0 1 — —
2.5M
0 0*
Notes:
Blank: No setting is available.
—: A setting is available, but the bit rate is inaccurate.
*: Continuous transfer is not possible.
B = OSC × 106/[8 × 22n × (N + 1)]
N: BRR value (0 ≤ N ≤ 255)
OSC: Crystal oscillator frequency in MHz
B: Bit rate (bits per second)
n: 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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