MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 611

• 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

PRESDIV — Prescaler Divide Register
16.7.6 Prescaler Divide Register
MPC555
USER’S MANUAL
MSB
Bit(s)
13:15
0
0
RESET:
0:7
10
11
12
8
9
1
0
/
CANCTRL0
PROPSEG
MPC556
TSYNC
SAMP
Name
LBUF
—
—
2
0
PRESDIV
3
0
See
Sampling mode. The SAMP bit determines whether the TouCAN module will sample each
received bit one time or three times to determine its value.
0 = One sample, taken at the end of phase buffer segment one, is used to determine the
1 = Three samples are used to determine the value of the received bit. The samples are tak-
Reserved
Timer synchronize mode. The TSYNC bit enables the mechanism that resets the free-run-
ning timer each time a message is received in message buffer zero. This feature provides
the means to synchronize multiple TouCAN stations with a special “SYNC” message (global
network time).
0 = Timer synchronization disabled.
1 = Timer synchronization enabled.
Note: there can be a bit clock skew of four to five counts between different TouCAN modules
that are using this feature on the same network.
Lowest buffer transmitted first. The LBUF bit defines the transmit-first scheme.
0 = Message buffer with lowest ID is transmitted first.
1 = Lowest numbered buffer is transmitted first.
Reserved
Propagation segment time. PROPSEG defines the length of the propagation segment in the
bit time. The valid programmed values are zero to seven. The propagation segment time is
calculated as follows:
Propagation Segment Time = (PROPSEG + 1) Time Quanta
where
1 Time Quantum = 1 Serial Clock (S-Clock) Period
Table 16-16 CANCTRL1 Bit Descriptions
Table 16-13
value of the received bit.
en at the normal sample point and at the two preceding periods of the S-clock.
4
0
CAN 2.0B CONTROLLER MODULE
5
0
Rev. 15 October 2000
6
0
7
0
8
0
Description
9
0
10
0
CANCTRL2
11
0
12
0
13
0
0x30 7088
0x30 7488
MOTOROLA
14
0
16-29
LSB
15
0