M16C/62P Group (M16C/62P, M16C/62PT)
9. Memory Space Expansion Function
Rev.2.41
Jan 10, 2006
Page 73 of 390
REJ09B0185-0241
Figure 9.1
DBR Register
Data Bank Register
(1)
Symbol
Address
After Reset
DBR
000Bh
00h
Bit Symbol
Bit Name
RW
NOTES :
1.
b7 b6 b5 b4 b3 b2 b1 b0
—
(b1-b0)
—
Nothing is assigned. When w rite, set to “0”.
When read, their contents are “0”.
Function
OFS
Offset Bit
RW
0 : Not offset
1 : Offset
BSR0
RW
b5 b4 b3
0 0 1 : Bank 1
0 1 1 : Bank 3
1 0 1 : Bank 5
1 1 1 : Bank 7
b5 b4 b3
0 0 0 : Bank 0
0 1 0 : Bank 2
1 0 0 : Bank 4
1 1 0 : Bank 6
Bank Selection Bits
BSR1
RW
BSR2
RW
—
(b7-b6)
Nothing is assigned. When w rite, set to “0”.
When read, their contents are “0”.
—
Effective w hen the PM01 to PM00 bits in the PM0 register are set to “01b” (memory expansion mode) or “11b”
(microprocessor mode).
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