CHAPTER 10 SERIAL INTERFACE FUNCTION
User’s Manual U13850EJ4V0UM
317
(3) Baud rate generator control registers 0, 1 (BRGC0, BRGC1)
These registers set the serial clock for UARTn.
BRGCn can be set by an 8-bit memory manipulation instruction.
RESET input clears these registers to 00H.
Figure 10-35. Baud Rate Generator Control Registers 0, 1 (BRGC0, BRGC1)
After reset: 00H
R/W
Address: FFFFF304H, FFFFF314H
7
6
5
4
3
2
1
0
BRGCn
MDLn7
MDLn6
MDLn5
MDLn4
MDLn3
MDLn2
MDLn1
MDLn0
(n = 0, 1)
MD
Ln7
MD
Ln6
MD
Ln5
MD
Ln4
MD
Ln3
MD
Ln2
MD
Ln1
MD
Ln0
Selection of input clock
k
0
0
0
0
0
×
×
×
Setting prohibited
−
0
0
0
0
1
0
0
0
f
SCK
/8
8
0
0
0
0
1
0
0
1
f
SCK
/9
9
0
0
0
0
1
0
1
0
f
SCK
/10
10
0
0
0
0
1
0
1
1
f
SCK
/11
11
0
0
0
0
1
1
0
0
f
SCK
/12
12
0
0
0
0
1
1
0
1
f
SCK
/13
13
0
0
0
0
1
1
1
0
f
SCK
/14
14
0
0
0
0
1
1
1
1
f
SCK
/15
15
0
0
0
1
0
0
0
0
f
SCK
/16
16
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1
1
1
1
1
1
1
1
f
SCK
/255
255
Cautions 1. The value of BRGCn becomes 00H after reset. Before starting operation, select a setting
other than “Setting prohibited”. Selecting the “Setting prohibited” setting in stop mode does
not cause any problems.
2. If write is performed to BRGCn during communication processing, the output of the baud
rate generator will be disturbed and communication will not be performed normally.
Therefore, do not write to BRGCn during communication processing.
Remark
f
SCK
: Source clock of 8-bit counter
