參數(shù)資料
型號： M37281MKH-XXXSP
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
中文描述： 單芯片8位CMOS微機(jī)隱蔽字幕解碼器和屏幕顯示控制器
文件頁數(shù)： 14/172頁
文件大?。?/td> 1319K
代理商： M37281MKH-XXXSP
M37281MAH
–
XXXSP,M37281MFH
–
XXXSP,M37281MKH
–
XXXSP, M37281EKSP
Rev.1.01 2003.07.16 page 14 of 170
Fig. 8.2.3 Bank Control Register
8.2.10 Expansion ROM (only M37281MKH-
XXXSP/M37281EKSP)
The M37281MKH-XXXSP/M37281EKSP can use 5-bank (total 20K
bytes) expansion ROM (4K bytes each bank) by setting the bank
register.
The expansion ROM is assigned to address 1B000
16
to 1FFFF
16
.
The contents of each bank in the expansion ROM are read by setting
the bank register and accessing addresses 1000
16
to 1FFF
16
. As the
expansion ROM is not programmable, use it as data-dedicated area.
When using the expansion ROM area, the internal ROM at addresses
1000
16
to 1FFF
16
(extra area) is not also programmable.
Notes 1:
When using the expansion ROM (BK7 =
“
1
”
), the ROM correction
function do not operate for addresses 1000
16
to 1FFF
16
.
2:
When using the emulator MCU (M37281ERSS), as addresses 1000
16
to FFFF
16
can be emulated by setting bit 7 of the bank control regis-
ter to
“
0,
”
the expansion ROM cannot be used. Addresses 2000
16
to
FFFF
16
can be emulated by setting it to
“
1.
”
The data in specified
area by the bank selection bits can be read by accessing addresses
1000
16
to 1FFF
16
.
3:
When using the emulator MCU, the expansion ROM and the extra
area cannot be emulated by setting bit 7 of the bank control register
to
“
1.
”
Therefore, write the data to this area before using.
4:
For the M37281MKH-XXXSP, fix bit 7 of the bank control register to
“
1.
”
For M37281MAH-XXXSP and M37281MFH-XXXSP, fix the ad-
dress 00ED
16
to
“
00
16
.
”
b7 b6 b5 b4 b3 b2 b1 b0
0
0
B
a
n
k
c
o
n
t
r
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l
r
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i
s
t
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r
(
B
K
)
[
A
d
d
r
e
s
s
0
0
E
D
1
6
]
B
N
a
m
e
Functions
B
a
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k
C
o
n
t
r
o
l
R
e
g
i
s
t
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r
0
t
o
3
6, 7 Bank control
bits
(BK6, BK7)
Bank number is selected (bank 11 to 15)
Bank
selection bits
(BK0 to BK3)
4
,
5 Fix these bits to
“
0.
”
A
f
t
e
r
r
e
s
e
t R W
0
R W
0
R W
0
R W
0
1
0
1
1
Not used
Used
Used
R
(
p
R
f
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t
h
R
(
d
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o
a
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a
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-
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a
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b
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e
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b
6 Bank ROM A
d
a
c
d
c
r
e
s
s
s
s
1
0
0
0
1
6
l
e
v
e
l
e
b7
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