HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 485

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

16.3.8
The bit rate register 2 (SCBRR2) is an eight-bit register that, together with the baud rate generator
clock source selected by the CKS1 and CKS0 bits in the SCSMR2, determines the serial
transmit/receive bit rate.
The CPU can always read and write the SCBRR2. The SCBRR2 is initialized to H'FF by a reset or
in module standby or standby mode. Each channel has independent baud rate generator control, so
different values can be set in two channels.
The SCBRR2 setting is calculated as follows:
Table 16.2 SCSMR2 Settings
Note: Find the bit rate error by the following formula:
n
0
1
2
3
B:
N:
P : Operating frequency for peripheral modules (MHz)
n:
Error (%) =
Asynchronous mode: N =
Bit Rate Register 2 (SCBRR2)
Bit rate (bit/s)
SCBRR2 setting for baud rate generator (0
Baud rate generator clock source (n
n, see table 16.2.)
(N+1) × 64 × 2
Clock Source
P
P /4
P /16
P /64
P × 10
64
2n
6
–
1
2
× B
P
2n – 1
– 1
CKS1
0
0
1
1
B
0, 1, 2, 3) (for the clock sources and values of
× 100
10
N
6
– 1
255)
SCSMR2 Settings
Rev. 4.00, 03/04, page 439 of 660
CKS0
0
1
0
1