AT90PWM2/3/2B/3B
19.6.6
Manchester receiver Baud Rate Registers – MUBRRL and MUBRRH
Bit
15
14
13
12
11
10
9
8
MUBRR[15:8]
MUBRR[7:0]
MUBRRH
MUBRRL
7
R/W
R/W
0
6
R/W
R/W
0
5
R/W
R/W
0
4
R/W
R/W
0
3
R/W
R/W
0
2
R/W
R/W
0
1
R/W
R/W
0
0
R/W
R/W
0
Read/Write
Initial Value
0
0
0
0
0
0
0
0
• 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]=FCLKIO / (baud rate frequency)
Table 19-5. Examples of MUBRR Settings for Commonly Frequencies
fclkio
1
=
fclkio
1.8432
MHz
=
fclkio
2.0000
MHz
=
fclkio
4.0000
MHz
=
fclkio
8.0000
MHz
=
fclkio
11.0592
MHz
=
fclkio =
16.000
MHz
Baud
Rate
(bps)
MHz
833
417
208
104
1200
2400
4800
9600
1536
768
384
192
1667
833
417
208
3333
1667
833
6667
3333
1667
833
9216
4608
2304
1152
13333
6667
3333
1667
417
225
4317J–AVR–08/10
ATMEL [ ATMEL ]
