386
Chapter 13
Serial Interface Function
Preliminary User’s Manual U15839EE1V0UM00
(b) Baud rate generator control registers (BRGC0, BRGC1)
The BRGCm register is an 8-bit register that controls the baud rate (serial transfer speed) of
UART5n.
This register can be read or written in 8-bit or 1-bit units (m = 0, 1).
Figure 13-18:
Baud Rate Generator Control Registers (BRGC0, BRGC1)
Caution:
If the MDL7 to MDL0 bits are to be overwritten, TXE bit and RXE bit should be set to 0
in the ASIMn register first.
Remarks: 1. f
CLK
:Frequency [Hz] of basic clock selected according to TPS3 to TPS0 bits of
CKSRm register
2. k: Value set according to MDL7 to MDL0 bits (k = 8, 9, 10,..., 255)
3. The baud rate is the output clock for the 8-bit counter divided by 2
4. x: don’t care
7
6
5
4
3
2
1
0
Address
Initial
value
BRGC0
MDL7
MDL6
MDL5
MDL4
MDL3
MDL2
MDL1
MDL0
FFFF FA07H
FFH
BRGC1
MDL7
MDL6
MDL5
MDL4
MDL3
MDL2
MDL1
MDL0
FFFF FA47H
FFH
Bit Position
Bit Name
Function
7 to 0
MDL7 to
MDL0
MDL7
MDL6
MDL5
MDL4
MDL3
MDL2
MDL1
MDL0
Divisor
Value
(k)
Serial Clock
0
0
0
0
0
x
x
x
–
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
Summary of Contents for mPD703128
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