參數(shù)資料
型號： M37281MAH-XXXSP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
封裝： 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-52
文件頁數(shù)： 68/174頁
文件大小： 1420K
代理商： M37281MAH-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 1B00016 to 1FFFF16.
The contents of each bank in the expansion ROM are read by setting
the bank register and accessing addresses 100016 to 1FFF16. As the
expansion ROM is not programmable, use it as data-dedicated area.
When using the expansion ROM area, the internal ROM at addresses
100016 to 1FFF16 (extra area) is not also programmable.
Notes 1: When using the expansion ROM (BK7 = “1”), the ROM correction
function do not operate for addresses 100016 to 1FFF16.
2: When using the emulator MCU (M37281ERSS), as addresses 100016
to FFFF16 can be emulated by setting bit 7 of the bank control regis-
ter to “0,” the expansion ROM cannot be used. Addresses 200016 to
FFFF16 can be emulated by setting it to “1.” The data in specified
area by the bank selection bits can be read by accessing addresses
100016 to 1FFF16.
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 00ED16 to “0016.”
b7 b6 b5 b4 b3 b2 b1 b0
Bank control register (BK) [Address 00ED16]
B
Name
Functions
Bank Control Register
0
to
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.”
After reset R W
0
R W
0
R W
0
R W
0
10
11
Not used
Used
Read out from extra area
(programmable)
Read out the data
from area specified by
the bank selection bits
Read out from extra area
(data-dedicated)
b6 Bank ROM Address 100016 level
access
b7
0
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PDF描述
M37281MKH-XXXSP 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP52
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37281MFH-XXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M37281MKH-XXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER
M372899234 制造商:ITW Switches 功能描述:IN-RUSH
M372F3200DJ3-C 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:32M x 72 DRAM DIMM with ECC Using 16Mx4, 4K & 8K Refresh, 3.3V
M372F3280DJ3-C 制造商:SAMSUNG 制造商全稱:Samsung semiconductor 功能描述:32M x 72 DRAM DIMM with ECC Using 16Mx4, 4K & 8K Refresh, 3.3V
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