Uart Command Registers (Ucrn); Ucsrn Field Descriptions - Motorola ColdFire MCF5281 User Manual

Bits Name
7–4 RCS Receiver clock select. Selects the clock source for the receiver channel.
1101 Prescaled system clock
1110 DTIN divided by 16
1111 DTIN
3–0 TCS Transmitter clock select. Selects the clock source for the transmitter channel.
1101 Prescaled system clock
1110 DTIN divided by 16
1111 DTIN

23.3.5 UART Command Registers (UCRn)

The UCRs, shown in Figure 23-6, supply commands to the UART. Only multiple
commands that do not conflict can be specified in a single write to a UCRn. For example,
RESET TRANSMITTER
7
Field —
Reset
R/W
Address
Table 23-6 describes UCRn fields and commands. Examples in Section 23.5.2,
"Transmitter and Receiver Operating Modes," show how these commands are used.
MOTOROLA
Table 23-5. UCSRn Field Descriptions
and
ENABLE TRANSMITTER
6
MISC
IPSBAR + 0x208(UCR0), 0x248(UCR1), 0x288(UCR2)
Figure 23-6. UART Command Register (UCRn)
Chapter 23. UART Modules
Description
cannot be specified in one command.
4 3 2
TC
0000_0000
Write only
Register Descriptions
1 0
RC
23-9