Oki JOB60851, User Manual, Page: 30 / 67

Chapter 3 System Specifications
page 3-8
3-2-4. Memory Maps
This Section gives code and data memory maps for the various JOB60851 operation modes.
(1) Download mode
This mode maps the code memory to the EPROM and the data memory to program RAM and
Flash memory. It uses the loader, a program stored in the EPROM, to download a user
application program over a serial link from the development host to program RAM.
Figure 3.2.4. Memory Map for Download Mode
1:0000 h
0:0200 h
0:1200 h
0:0000 h
SFR/XSFR
Int._RAM
0:8000 h
0:3000 h
0:2000 h
Ext._SRAM(A)or(B)
ML60851A
1:0200 h
1:1200 h
1:8000 h
1:3000 h
1:2000 h
1:FFFFh
Data Memory
0:0000 h
Program Memory
0:7 FFFh
SFR/XSFR
Int._RAM
ML60851A
Loader Mode 1 memory map
( Load_Sel/ = L ) ( EA/ = L )
Ext._EPROM(E)
(Loader Program)
1:0000 h
0:0000 h
0:8000 h
1:8000 h
1:FFFFh
Ext._SRAM
0:0000 h
Ext._EPROM
0:7 FFFh
(A)
(B)
(C)
(D)
(E)
Ext._SRAM(A)or(B)
Ext._SRAM(A)or(B)
Ext._SRAM(C)or(D)
Ext._SRAM(C)or(D)
Ext._SRAM(C)or(D)