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Bit 2—Multiprocessor Mode (MP): Selects a multiprocessor format. When a multiprocessor
format is selected, parity settings made by the PE and O/E bits are ignored. The MP bit setting is
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valid only in asynchronous mode. It is ignored in synchronous mode.
For further information on the multiprocessor communication function, see section 13.3.3,
Multiprocessor Communication.
Bit 2
MP
Description
0
Multiprocessor function disabled
1
Multiprocessor format selected
Bits 1 and 0—Clock Select 1 and 0 (CKS1/0): These bits select the clock source of the on-chip
baud rate generator. Four clock sources are available: ø, ø/4, ø/16, and ø/64.
For the relationship between the clock source, bit rate register setting, and baud rate, see
section 13.2.8, Bit Rate Register (BRR).
Bit 1
Bit 0
CKS1
CKS0
Description
0
0
ø
0
1
ø/4
1
0
ø/16
1
1
ø/64
446
(Initial value)
(Initial value)
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