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參數(shù)資料
| 型號(hào)： | UPD17218 |
| 廠商： | NEC Corp. |
| 元件分類： | 4位微控制器 |
| 英文描述： | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| 中文描述： | 4位單片機(jī)的小型通用紅外遙控器 |
| 文件頁(yè)數(shù)： | 9/84頁(yè) |
| 文件大?。?/td> | 350K |
| 代理商： | UPD17218 |
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μ
PD17215, 17216, 17217, 17218
9
1.3
Processing of Unused Pins
Process the unused pins as follows:
Table 1-1 Processing of Unused Pins
Pin
Recommended Connection
P0A
0
-P0A
3
Connect to V
DD
P0B
0
-P0B
3
Connect to V
DD
P0C
0
-P0C
3
Connect to GND
P0D
0
-P0D
3
Connect to GND
P0E
0
-P0E
3
Input
Output : Open
: Connect to V
DD
or GND
REM
Open
INT
Connect to GND
WDOUT
Connect to GND
1.4
Notes on Using INT and RESET Pins
In addition to the functions shown in 1.1 PIN FUNCTIONS, the INT and RESET pins also have a function to set a test
mode (for IC testing) in which the internal operations of the
μ
PD17215 are tested.
When a voltage higher than V
DD
is applied to either of these pins, the test mode is set. This means that, even during
ordinary operation, the
μ
PD17215 may be set in the test mode if a noise exceeding V
DD
is applied.
For example, if the wiring length of the INT or RESET pin is too long, noise superimposed on the wiring line of the pin
main cause the above problem.
Therefore, keep the wiring length of these pins as short as possible to suppress the noise; otherwise, take noise
preventive measures as shown below by using external components.
Connect diode with low V
F
between V
DD
and INT/RESET pin
V
DD
V
DD
V
DD
V
DD
INT, RESET
INT, RESET
Diode with
low V
F
If the test mode is set by the INT pin, low level is output from the WDOUT pin. In this case, connect the WDOUT and
RESET pin.
Connect capacitor between V
DD
and
INT/RESET pin
相關(guān)PDF資料 |
PDF描述 |
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| UPD17218CT | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
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| UPD17215GT | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17217CT | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17215 | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UPD17218CT | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17218GT | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17225 | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17225CT | 制造商:NEC 制造商全稱:NEC 功能描述:4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| UPD17225CT-XXX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
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