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参数资料
| 型号： | M38B79FFFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 4.2 MHz, MICROCONTROLLER, PQFP100 |
| 封装： | 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件页数： | 62/112页 |
| 文件大小： | 1862K |
| 代理商： | M38B79FFFP |
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38B7 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
50
Fig. 50 FLD automatic display RAM assignment
FLD Automatic Display RAM
The FLD automatic display RAM uses the 224 bytes of addresses
0E0016 to 0EDF16. For FLD, the 3 modes of 16-timingordinary
mode, 16-timinggradation 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 0E7016 to 0EDF16 are used as a FLD display
data store area. Because addresses 0E0016 to 0E6F16 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 0E0016 to 0EDF16 are used. The 112 bytes of
addresses 0E7016 to 0EDF16 are used as an FLD display data
store area, while the 112 bytes of addresses 0E0016 to 0E6F16 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 0E0016 to 0EDF16 are used as an
FLD display data store area.
The FLD data pointer (address 0EF816) 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.
16-timingordinary mode
0EDF16
0E7016
0E0016
0EDF16
0E0016
0EDF16
0E7016
0E0016
16-timinggradation display mode
32-timing mode
1 to 32 timing display
data stored area
Gradation display
control data stored
area
1 to 16 timing display
data stored area
1 to 16 timing display
data stored area
Not used
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