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參數(shù)資料
| 型號(hào)： | EM78P468NQ |
| 廠商： | ELAN Microelctronics Corp . |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁(yè)數(shù)： | 33/82頁(yè) |
| 文件大?。?/td> | 1491K |
| 代理商： | EM78P468NQ |
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EM78P468N
8-BIT Microcontroller
4.4 I/O Ports
The I/O registers, (PORT 5, PORT 6, PORT 7and PORT 8), are bi-directional tri-state I/O
are pulled-high internally by software; PORT 6 is also
pulled-low int
urthermore, PORT 6 has its open-drain output also
PORT 8 features an input status changed interrupt (or
ke
ed-high by software. Each I/O pin can be defined as "input"
wa
-up) function and is pull
or "output" pin by the I/O control register (IOC50 ~ IOC80). The I/O registers and I/
control registers are both readable and writable. The I/O interface circuits are show
Fig. 8
O
n in
ports. PORT 6 and PORT 8
ernally by software. F
through software. PORT 6 and
NOTE:
Open-drain, pull high, and pull down are not shown in the figure.
Fig. 8 The Circuit of I/O Port and I/O Control Register for PORT 5 ~ 8
Product Specification
(V1.2) 03.15.2005
(This specification is subject to change without further notice)
29
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