Datasheet

226
4317K–AVR–03/2013
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 151413121110 9 8
MUBRR[15:8] MUBRRH
MUBRR[7:0] MUBRRL
76543210
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 00000000
00000000
Table 19-5. Examples of MUBRR Settings for Commonly Frequencies
Baud
Rate
(bps)
fclk
io
=
1
MHz
fclk
io
=
1.8432
MHz
fclk
io
=
2.0000
MHz
fclk
io
=
4.0000
MHz
fclk
io
=
8.0000
MHz
fclk
io
=
11.0592
MHz
fclk
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