Memory
Organization
00-7F
80-FF
80-FF
00-FF
00-
RAM, Access it via direct addressing
SFR, Access it via direct addressing
indirect on-chip RAM,
Access it via indirect addressing
on-chip expanded RAM (256B),
Access it via
MOVX
instruction
off-chip memory, enabled by setting
ERAM=1
FZWDTCR
MEGAWIN
00
0000
Bit-7
7
Address Space for MPC89x53A embedded Flash memory
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
MOVCL
Bit-1
SB
Bit-0
LOCK
80
7F
6
Address Space for MPC89x53A RAM
ISPAS1
ISPAS0
-
Non-volatile register OR0
FF
0000 ~
Program Memory
2C00-3BFF
or
3400-3BFF
or
3800-3BFF
ISP
program memory.
(1KB, 2KB or 4KB )
depending on
OR0[5:4]
3BFF
5
4
3
2
1
HWBS
0
EN6T
OSCDN
Non-volatile register OR1
MPC89x53A Data Sheet
9