MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 552

• 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

15.10.1.1 MMCSM Up-Counter Register (MMCSMCNT)
MMCSMCNT — MMCSM Up-Counter Register
U = Unaffected by reset
15.10.1.2 MMCSM Modulus Latch Register (MMCSMML)
MMCSMML — MMCSM Modulus Latch Register
U = Unaffected by reset
15.10.1.3 MMCSM Status/Control Register (Duplicated)
MPC555
USER’S MANUAL
MSB
MSB
Bit(s)
Bit(s)
0:15
0:15
U
U
0
0
RESET:
RESET:
The MMCSMCNT register contains the 16-bit value of the up counter. Note that writing
to MMCSMCNT simultaneously writes to MMCSMML.
The MMCSMML is a read/write register containing the 16-bit value of the up-counter.
The MMCSMSCRD and the MMCSMSCR are the same registers accessed at two dif-
ferent addresses. Reading or writing to one of these two addresses has exactly the
same effect.
U
U
1
1
/
MPC556
Name
Name
CNT
ML
U
U
2
2
The user should not write directly to the address of the MMCSM-
SCRD. This register’s address may be reserved for future use and
should not be accessed by the software to assure future software
compatibility.
Counter value. These read/write data bits represent the 16-bit value of the up-counter. CNT con-
tains the value that is driven onto the 16-bit counter bus.
Modulus latches. These bits are read/write data bits containing the 16-bit modulus value to be
loaded into the up-counter.
The value loaded in this register must be the two’s complement of the desired modulus count.
The up-counter increments from this two’s complement value up to 0xFFFF to get the correct
number of steps before an overflow is generated to reload the modulus value into the up-
counter. A value of 0x0000 should be used for a free-running counter.
U
U
3
3
Table 15-12 MMCSMCNT Bit Descriptions
MODULAR INPUT/OUTPUT SUBSYSTEM (MIOS1)
Table 15-13 MMCSMML Bit Descriptions
U
U
4
4
U
U
5
5
Rev. 15 October 2000
U
U
6
6
U
U
7
7
CNT
ML
NOTE
U
U
8
8
Description
Description
U
U
9
9
10
10
U
U
11
11
U
U
12
12
U
U
13
13
U
U
0x30 60B0
0x30 60B2
0x30 6030
0x30 6032
MOTOROLA
14
14
U
U
15-16
LSB
LSB
15
15
U
U