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Chapter 13 Auxiliary Frequency Output Function (AFO)
13.3 Control Registers
(1)
Prescaler mode register 2 (PRSM2)
The PRSM2 register controls generation of a baud rate signal for the AFO function.
This register can be read or written in 8-bit or 1-bit units.
Reset input clears this register to 00H.
After reset:
00H
7
PRSM2
BGCE2
0
1
BGCS21
0
0
1
1
Cautions: 1. Do not rewrite the PRSM2 register during operation.
2. Set the BGCS21, BGCS20 bits before setting the BGCE2 bit to 1.
570
Figure 13-2: Prescaler Mode Register 2 (PRSM2)
R/W
Address:
6
5
0
0
Baud Rate Generator Output Control
Disabled
Enabled
BGCS20
Baud Rate Generator Clock Selection (f
0
f
XX
1
f
/2
XX
0
f
/4
XX
1
f
/8
XX
User's Manual U16580EE3V1UD00
FFFFFDE0H
4
3
BGCE2
0
2
1
0
0
BGCS21
BGCS20
)
Setting Value (k)
BGCS2
0
1
2
3
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