MCF5307AI66B Datasheet, PDF (319/484 Pages) Motorola, Inc – Integrated Microprocessor User’s Manual

Freescale Semiconductor, Inc.
Register Descriptions
Table 14-5 describes UCSRn fields.
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
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 conflict can be specified in a single write to a UCRn. For
example, RESET TRANSMITTER and ENABLE TRANSMITTER cannot be specified in one
command.
Field
Reset
R/W
Address
7
6
4
—
MISC
3
2
TC
1
0
RC
0000_0000
Write only
MBAR + 0x1C8, 0x208
Figure 14-6. UART Command Register (UCRn)
Table 14-6 describes UCRn fields and commands. Examples in Section 14.5.2,
“Transmitter and Receiver Operating Modes,” show how these commands are used.
Table 14-6. UCRn Field Descriptions
Bits Value
7
—
Command
—
Reserved, should be cleared.
Description
Chapter 14. UART Modules
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14-9