MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 398

• 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

11.8 L2U Programming Model
MPC555
USER’S MANUAL
L2U_RBA0
L2U_RBA1
L2U_RBA2
L2U_RBA3
L2U_MCR
L2U_GRA
L2U_RA0
L2U_RA1
L2U_RA2
L2U_RA3
Name
1. L-bus slave includes all address in the L-bus address space.
2. L2U indicates L2U registers.
3. U-bus/E-bus refers to all destinations through the L2U interface.
4. There will be a 1-clock turnaround because the L-bus retry information is not available in time to negate the L-
Note: X indicates don’t care conditions.
The L2U control registers control the L2U bus interface and the DMPU. They are ac-
cessible via the MPC555 / MPC556 mtspr and mfspr instructions. They are also ac-
cessible by an external master when EMCR[CONT] bit is cleared. L2U control
registers are accessible from both the L-bus side and the U-bus side in one clock cy-
cle. As with all SPRs, L2U registers are accessible in supervisor mode only.
Any unimplemented bits in L2U registers return 0’s on a read, and the writes to those
register bits are ignored.
The
addresses which are used to access L2U registers during a peripheral mode access.
bus arbitration.
Case
Table 11-5
/
1
2
3
4
5
MPC556
SPR #
568
792
793
794
795
824
825
826
827
536
U-bus/E-bus
Destination
L-bus Slave
L-bus slave
L-bus slave
L2U
SPR5:9
shows L2U registers along with their SPR numbers and hexadecimal
10001
11000
11000
11000
11000
11001
11001
11001
11001
10000
Table 11-4 L2U Show Cycle Support Chart
2
Table 11-5 L2U (PPC) Register Decode
1
3
L-BUS TO U-BUS INTERFACE (L2U)
SPR0:4
11000
11000
11001
11010
11011
11000
11001
11010
11011
11000
LB AACK
Yes
Yes
No
X
X
Rev. 15 October 2000
External Master
0x0000_3110
0x0000_3180
0x0000_3380
0x0000_3580
0x0000_3780
0x0000_3190
0x0000_3390
0x0000_3590
0x0000_3790
0x0000_3100
Address for
Access
LB ABORT
Yes
.
No
X
X
X
Access
SUPR
SUPR
SUPR
SUPR
SUPR
SUPR
SUPR
SUPR
SUPR
SUPR
[Cycle will be retried one clock later]
[L-bus will be released next clock]
Not show cycled
Not show cycled
Not show cycled
Not show cycled
L2U Module Configuration Register
Region Base Address Register 0
Region Base Address Register 1
Region Base Address Register 2
Region Base Address Register 3
Comments
Show cycled
Region Attribute Register 0
Region Attribute Register 1
Region Attribute Register 2
Region Attribute Register 3
Global Region Attribute
Description
MOTOROLA
4
11-12