Motorola MPC823e User Manual

Memory Management Unit
MOTOROLA MPC823e REFERENCE MANUAL 11-11
MEMORY MANAGEMENT
11
UNIT
PP2—Protection for a Second 1K Subpage in a 4K Page
This field contains a protection code for the second subpage in a 4K page. Depending on
the encoding mode, this field has different meanings.
PAGES OVER 4K WITH 4K RESOLUTION PROTECTION (EXTENDED ENCODING)
PP1
SETTING
INSTRUCTION PAGES DATA PAGES
PRIVILEGED MODE PROBLEM MODE PRIVILEGED MODE PROBLEM MODE
00 No access No access No access No access
01 Executable No access Read-only No access
10 Reserved Reserved Reserved Reserved
11 Reserved Reserved Reserved Reserved
PAGES OVER 4K WITH 4K RESOLUTION PROTECTION (POWERPC ENCODING)
PP1
SETTING
INSTRUCTION PAGES DATA PAGES
PRIVILEGED MODE PROBLEM MODE PRIVILEGED MODE PROBLEM MODE
00 Executable Executable Read-only Read-only
01 Executable No access Read-only No access
10 Executable Executable Read/Write Read-only
11 Executable Executable Read/Write Read/Write
4K PAGES WITH 1K RESOLUTION PROTECTION
PP2
SETTING
INSTRUCTION PAGES DATA PAGES
PRIVILEGED MODE PROBLEM MODE PRIVILEGED MODE PROBLEM MODE
00 No access No access No access No access
01 Executable No access Read/Write No access
10 Executable Executable Read/Write Read-only
11 Executable Executable Read/Write Read/Write

Motorola MPC823e Specifications

General

Brand	Motorola
Model	MPC823e
Category	Computer Hardware
Language	English