h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 485

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

The BRR setting is found from the following formulas.
Asynchronous mode:
Clocked synchronous mode:
Where B: Bit rate (bit/s)
The bit rate error in asynchronous mode is found from the following formula:
n
0
1
2
3
N =
N =
Error (%) = {
N: BRR setting for baud rate generator (0 ≤ N ≤ 255)
φ: Operating frequency (MHz)
n: Baud rate generator input clock (n = 0 to 3)
Clock
φ
φ/4
φ/16
φ/64
(See the table below for the relation between n and the clock.)
64 × 2
8 × 2
2n–1
φ
φ
2n–1
CKS1
0
0
1
1
× B
× B
(N + 1) × B × 64 × 2
SMR Setting
× 10
× 10
φ × 10
6
6
CKS0
0
1
0
1
– 1
– 1
6
2n–1
Section 13 Serial Communication Interface (SCI)
– 1} × 100
Rev. 5.00 Sep 22, 2005 page 459 of 1136
REJ09B0257-0500