參數(shù)資料
型號: M38B7
廠商: Mitsubishi Electric Corporation
英文描述: Single Chip 8 Bits Microcomputer(8位單片機)
中文描述: 單芯片8位單片機(8位單片機)
文件頁數(shù): 56/109頁
文件大?。?/td> 1555K
代理商: M38B7
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
56
Fig. 56 Timing using FLD blanking interrupt
The FLD blanking interrupt is generated when the FLD data
pointer (address 0EF8
16
) reaches
FF
16
. The FLD automatic dis-
play output is turned off for a duration of 1
Tdisp, 2
Tdisp, or
3
Tdisp depending on post-interrupt settings. During this time,
key scanning that makes use of FLD segments can be achieved.
When the key scanning is performed with the segment during
key-scan blanking time Tscan, follow the procedure described
below:
(1) Write
0
to the automatic display control bit (bit 0 of address
0EF4
16
).
(2) Set the port corresponding to the segment for key scanning to
the output port.
(3) Perform key scanning.
(4) Write
1
to the automatic display control bit.
I
Note
When performing a key-scan according to the above steps 1 to 4,
take the following points into consideration.
1. Do not set the display start bit (bit 1 of address 0EF4
16
) to
0
.
2. Do not set
1
in the ports corresponding to digits.
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