Memory access
Using absolute addresses, you can access the following local or global
memory areas with the operations indicated (refer to Fig. 9-2).
Access to the local and global
area
You can access both the local and global areas:
•• Local area (addresses 0 0000H to E FFFFH) and global area
(addresses F 0000H to F FFFFH) with:
LIR, TIR, LDI, TDI, TNW, TXB, TXW,
•• Section of the local area organized in words (addresses 0 0000H
to E FBFFH) or in bytes (addresses E FC000 to E FFFF) with:
LRW, TRW, LRD, TRD.
Access only to the global area
You can access the following parts of the global area:
•• Section of the global area organized in bytes (addresses F 0000H
to F FFFFH) with:
LY GB, LY GW, LY GD, TY GB, TY GW, TY GD, TSG,
•• Section of the global area organized in words (addresses F 0000H
to F FFFFH) with:
LW GW, LW GD, TW GW, TW GD, TSG .
Access to the page area
You can access the following parts of the page area:
•• Section of the global area organized in bytes (addresses F F400H
to F FBFFH, = dual-port RAM area) with:
LY CB, LY CW, LY CD, TY CB, TY CW, TY CD, TSC,
•• Section of the global area organized in words (addresses F F400H
to F FBFFH, = dual-port RAM area) with:
LW CW, LW CD, TW CW, TW CD, TSC
Introduction
CPU 948 Programming Guide
9 - 6 C79000-G8576-C848-04
To Next Page
Loading...
