CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U12688EJ4V0UM00
314
10.4.3 Baud rate generator prescaler mode registers 0 to 2 (BPRM0 to BPRM2)
These registers control BRG0 to BRG2 timer count operations and select the count clock.
These registers can be read/written in 8- or 1-bit units.
Address
FFFFF086H
7
BRCE0
BPRM0
6
0
5
0
4
0
3
0
2
BPR02
1
BPR01
0
BPR00
After reset
00H
FFFFF096H
BRCE1
BPRM1
0
0
0
0
BPR12
BPR11
BPR10
00H
FFFFF0A6H
BRCE2
BPRM2
0
0
0
0
BPR22
BPR21
BPR20
00H
Bit Position
Bit Name
Function
7
BRCEn
Baud Rate Generator Count Enable
Controls the BRGn count operations.
0: Stops count operations in the cleared state.
1: Enables the count operation.
Baud Rate Generator Prescaler
Specifies the count clock input to the internal timer (TMBRGn).
BPRn2
BPRn1
BPRn0
Count Clock
0
0
0
φ
/2 (m = 0)
0
0
1
φ
/4 (m = 1)
0
1
0
φ
/8 (m = 2)
0
1
1
φ
/16 (m = 3)
1
don’t care don’t care
φ
/32 (m = 4)
2 to 0
BPRn2 to
BPRn0
m: Prescaler setting value
φ
: Internal system clock frequency
Caution Do not change the count clock during a transmit/receive operation.
Remark
n = 0 to 2
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