CHAPTER 12 SERIAL INTERFACE FUNCTION
Preliminary User’s Manual U15905EJ1V0UD
324
(b) Baud rate generator control register n (BRGCn)
The BRGCn register is an 8-bit register that controls the baud rate (serial transfer speed) of UARTn.
This register can be read or written in 8-bit units.
Caution
If the MDLn7 to MDLn0 bits are to be overwritten, the TXEn and RXEn bits should be
set to 0 in the ASIMn register first.
7
MDLn7
BRGCn
6
MDLn6
5
MDLn5
4
MDLn4
3
MDLn3
2
MDLn2
1
MDLn1
0
MDLn0
After reset:
FFH R/W
Address:
FFFFFA07H, FFFFFA17H
MD
Ln7
MD
Ln6
MD
Ln5
MD
Ln4
MD
Ln3
MD
Ln2
MD
Ln1
MD
Ln0
Division
value (k)
Serial
clock
0
0
0
0
0
×
×
×
−
Setting
prohibited
0
0
0
0
1
0
0
0
8
f
CLK
/8
0
0
0
0
1
0
0
1
9
f
CLK
/9
0
0
0
0
1
0
1
0
10
f
CLK
/10
:
:
:
:
:
:
:
:
:
:
1
1
1
1
1
0
1
0
250
f
CLK
/250
1
1
1
1
1
0
1
1
251
f
CLK
/251
1
1
1
1
1
1
0
0
252
f
CLK
/252
1
1
1
1
1
1
0
1
253
f
CLK
/253
1
1
1
1
1
1
1
0
254
f
CLK
/254
1
1
1
1
1
1
1
1
255
f
CLK
/255
Remarks 1.
f
CLK
: Frequency [Hz] of base clock (Clock) selected by TPSn3 to TPSn0 bits of CKSRn register
2.
k: Value set by MDLn7 to MDLn0 bits (k = 8, 9, 10, ..., 255)
3.
The baud rate is the output clock for the 8-bit counter divided by 2
4.
×
: Don’t care
Содержание V850ES/SA2 UPD703201
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