MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 507

• Manufacturer Part Number: MPC555CME
• Description: KIT EVALUATION FOR MPC555
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC555CME

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Processor To Be Evaluated: MPC555
• Data Bus Width: 32 bit
• Interface Type: RS-232
• For Use With/related Products: MPC555
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

14.8.2 SCI Control Register 0
SCCxR0 — SCI Control Register 0
14.8.3 SCI Control Register 1
MPC555
USER’S MANUAL
RESET:
Bit(s)
OTHR
3:15
MSB
0
1
2
0
0
SCCxR0 contains the SCIx baud rate selection field and two bits controlling the clock
source. The baud rate must be set before the SCI is enabled. The CPU can read and
write SCCxR0 at any time.
Changing the value of SCCxR0 bits during a transfer operation can disrupt the trans-
fer. Before changing register values, allow the SCI to complete the current transfer,
then disable the receiver and transmitter.
SCCxR1 contains SCIx configuration parameters, including transmitter and receiver
enable bits, interrupt enable bits, and operating mode enable bits. The CPU can read
or write this register at any time. The SCI can modify the RWU bit under certain cir-
cumstances.
Changing the value of SCCxR1 bits during a transfer operation can disrupt the trans-
fer. Before changing register values, allow the SCI to complete the current transfer,
then disable the receiver and transmitter.
LNK-
/
BD
LNKBD
SCxBR
1
0
MPC556
OTHR
Name
—
2
0
0
This bit is reserved and should always be programmed to 0.
This bit is reserved and should always be programmed to 0.
SCI baud rate. The SCI baud rate is programmed by writing a 13-bit value to this field. Writing a
value of zero to SCxBR disables the baud rate generator. Baud clock rate is calculated as fol-
lows:
Refer to
Reserved
3
0
14.8.7.3 Baud Clock
Table 14-23 SCCxR0 Bit Descriptions
QUEUED SERIAL MULTI-CHANNEL MODULE
4
0
5
0
Rev. 15 October 2000
where SCxBR is in the range of 1 to 8191.
6
0
for more information.
7
0
SCI Baud Rate
8
0
Description
SCxBR
9
0
=
10
0
--------------------------------- -
32
×
f
SYS
SCxBR
11
0
12
0
13
1
0x30 5008
MOTOROLA
14
0
14-45
LSB
15
0