Chapter 14. UART Modules
14-9
Register Descriptions
14.3.5 UART Command Registers (UCRn)
The UART command registers (UCRn),
Figure 14-6, supply commands to the UART. Only
multiple commands that do not conict can be specied in a single write to a UCRn. For
example, RESET TRANSMITTER and ENABLE TRANSMITTER cannot be specied in one
command.
Table 14-5. UCSRn Field Descriptions
Bits
Name
Description
7–4
RCS
Receiver clock select. Selects the clock source for the receiver channel.
1101 Prescaled BCLKO
1110 TIN divided by 16
1111 TIN
3–0
TCS
Transmitter clock select. Selects the clock source for the transmitter channel.
1101 Prescaled BCLKO
1110 TIN divided by 16
1111 TIN
76
43210
Field
—
MISC
TC
RC
Reset
0000_0000
R/W
Write only
Address
MBAR + 0x1C8, 0x208
Figure 14-6. UART Command Register (UCRn)
Table 14-6. UCRn Field Descriptions
Bits
Value
Command
Description
7
——
Reserved, should be cleared.
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