MC68030RC50C Freescale Semiconductor, MC68030RC50C Datasheet - Page 346

• Manufacturer Part Number: MC68030RC50C
• Description: IC MPU 32BIT ENHANCED 128-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68030RC50C

• Processor Type: M680x0 32-Bit
• Speed: 50MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 128-PGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

9.5.5.1 FUNCTION CODE LOOKUP.
MOTOROLA
The protection mechanisms can be used individually or in any combination
to protect:
for mapping the supervisor spaces can be copied into each task's translation
tree. Figure 9-31 shows a translation tree using function code lookup, and
spaces from unauthorized access is to set the FCL bit in the TC register. This
effectively segments the logical address space into a supervisor program
space, a supervisor data space, a user program space, and a user data space,
as shown in Figure 9-30. Each task has an address translation tree with unique
mappings for the logical addresses in its user spaces. The translation tables
visor spaces.
Figure 9-32 shows translation trees for two tasks that share common super-
• Supervisor program and data spaces from access by user programs.
• User program and data spaces from access by other user programs or
• Supervisor and user program spaces from write accesses (except by the
• One or more pages of memory from write accesses.
232
Figure 9-30. Logical Address Map Using Function Code Lookup
0
supervisor using the MOVES instruction).
supervisor programs (except with the MOVES instruction).
m
SUPERVISOR
PROGRAM
SPACE
32
0
MC68030 USER'S MANUAL
b
SUPERVISOR
SPACE
DATA
One way of protecting supervisor and user
32
0
m
PROGP~,~
SPACE
USE~
32
0
SPACE
USER
DATA
9-45
9