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參數(shù)資料
| 型號： | M38B79MFH |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機 |
| 文件頁數(shù)： | 50/109頁 |
| 文件大小： | 1559K |
| 代理商： | M38B79MFH |
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38B7 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
PRELIMINARY
Notice: This is not a final specification.
change.
Some parametric limits are subject to
50
Fig. 50 FLD automatic display RAM assignment
FLD Automatic Display RAM
The FLD automatic display RAM uses the 224 bytes of addresses
0E00
16
to 0EDF
16
. For FLD, the 3 modes of 16-timing
ordinary
mode, 16-timing
gradation display mode and 32-timing mode are
available depending on the number of timings and the use/not use
of gradation display.
The automatic display RAM in each mode is as follows:
(1) 16-timingordinary mode
This mode is used when the display timing is 16 or less. The 112
bytes of addresses 0E70
16
to 0EDF
16
are used as a FLD display
data store area. Because addresses 0E00
16
to 0E6F
16
are not
used as the automatic display RAM, they can be the ordinary
RAM.
(2) 16-timinggradation display mode
This mode is used when the display timing is 16 or less, in which
mode each segment can be set for dark or bright display. The 224
bytes of addresses 0E00
16
to 0EDF
16
are used. The 112 bytes of
addresses 0E70
16
to 0EDF
16
are used as an FLD display data
store area, while the 112 bytes of addresses 0E00
16
to 0E6F
16
are
used as a gradation display control data store area.
(3) 32-timing mode
This mode is used when the display timing is 16 or greater. This
mode can be used for up to 32-timing.
The 224 bytes of addresses 0E00
16
to 0EDF
16
are used as an
FLD display data store area.
The FLD data pointer (address 0EF8
16
) is a register to count dis-
play timings. This pointer has a reload register. When the pointer
underflow occurs, it starts counting over again after being re-
loaded with the initial value in the reload register. Make sure that
(the timing counts
–
1) is set to the FLD data pointer. When writing
data to this address, the data is written to the FLD data pointer re-
load register; when reading data from this address, the value in
the FLD data pointer is read.
1
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