226
4317I–AVR–01/08
AT90PWM2/3/2B/3B
19.6.6
Manchester receiver Baud Rate Registers – MUBRRL and MUBRRH
• Bit 15:0 – MUBRR15:0: Manchester Receiver Baud Rate Register
This is a 16-bit register which contains the maximum value for the Machester receiver counter.
The MUBRRH contains the eight most significant bits, and the MUBRRL contains the eight least
significant bits. Ongoing transmissions by the Receiver will be corrupted if the baud rate is
changed.
MUBRR[H:L]=F
CLKIO
/ (baud rate frequency)
Bit
15
14
13
12
11
10
9
8
MUBRR[15:8]
MUBRRH
MUBRR[7:0]
MUBRRL
7
6
5
4
3
2
1
0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Table 19-5.
Examples of MUBRR Settings for Commonly Frequencies
Baud
Rate
(bps)
f
clk
io
=
1
MHz
f
clk
io
=
1.8432
MHz
f
clk
io
=
2.0000
MHz
f
clk
io
=
4.0000
MHz
f
clk
io
=
8.0000
MHz
f
clk
io
=
11.0592
MHz
f
clk
io
=
16.000
MHz
1200
833
1536
1667
3333
6667
9216
13333
2400
417
768
833
1667
3333
4608
6667
4800
208
384
417
833
1667
2304
3333
9600
104
192
208
417
833
1152
1667
