NEC 78K0 Series User Manual page 90

CHAPTER 4 MEMORY BANK SELECT FUNCTION (
4.2 Memory Bank Select Register (BANK)
The memory bank select register (BANK) is used to select a memory bank to be used.
BANK can be set by an 8-bit memory manipulation instruction.
Reset signal generation clears BANK to 00H.
Address: FFF3H After reset: 00H R/W
Symbol 7
BANK 0
BANK2
0
0
0
0
1
1
Caution Be sure to change the value of the BANK register in the common area (0000H to 7FFFH).
If the value of the BANK register is changed in the bank area (8000H to BFFFH), an inadvertent
program loop occurs in the CPU. Therefore, never change the value of the BANK register in the
bank area.
90
Figure 4-2. Format of Memory Bank Select Register (BANK)
6 5
0 0
BANK1 BANK0
0 0
0 1
1 0
1 1
0 0
0 1
Other than above
Preliminary User's Manual U17260EJ3V1UD
µ
PD78F0536, 78F0537, AND 78F0537D ONLY)
4 3
0 0 BANK2
Bank setting
µ
PD78F0536
Common area (32 K) + memory bank 0 (16 K)
Common area (32 K) + memory bank 1 (16 K)
Common area (32 K) + memory bank 2 (16 K)
Common area (32 K) + memory bank 3 (16 K)
Setting prohibited
Setting prohibited
2 1 0
BANK1 BANK0
µ
PD78F0537, 78F0537D
Common area (32 K) +
memory bank 4 (16 K)
Common area (32 K) +
memory bank 5 (16 K)