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參數(shù)資料
| 型號： | LA6513A |
| 文件頁數(shù)： | 12/24頁 |
| 文件大?。?/td> | 332K |
| 代理商： | LA6513A |
LC6512A, LC6513A
No.2367–12/24
2-12. External interrupt
The trailing edge of the signal on the INT pin is detected and the interrupt request flag in the status register is set. The
occurrence of an interrupt is controlled by the enable/disable flag in the control register.
2-13. Reset
The system is initialized by setting the RES pin to L-level. The contents to be initialized are as follows:
PC Address 000H
Control register 0000
→
Interrupt disable, Ports C, D: Output inhibit
Status register Timer, external interrupt flag
→
Reset
Output port Output latch (0
H
)
→
Output transistor OFF
Appendix 3. Proper Cares in Using IC
3-1. Low-threshold input port A
0
to
3
provides the input characteristic shown in Fig. 3-1.
3-2. FLT driver output
Ports E
0
to
3
, F
0
to
3
, I
0
to
1
(10 pins) are for high-current digits driver output; and ports G
0
to
3
, H
0
to
3
(8 pins) are for
intermediate-current segments driver outputs. Of course, digits driver outputs can be used as segments driver outputs.
Fig. 3-2 shows a sample application.
Fig. 3-1
Fig. 3-2 FLT display application
High-level input
Low-level input
V
DD
1.9V
0.5V
V
SS
Key scan
Digits
Segments
-Vpp
LC6512A, 6513A
Ports E,F,I
Ports G, H
-Vpp
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