參數(shù)資料
型號: UPD17207
廠商: NEC Corp.
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER WITH LCD CONTROLLER/DRIVER AND A/D CONVERTER FOR INFRARED REMOTE CONTROL TRANSMITTERS
中文描述: 4位單片機與LCD控制器/驅(qū)動器和A / D轉(zhuǎn)換器紅外遙控遞質(zhì)
文件頁數(shù): 13/120頁
文件大?。?/td> 516K
代理商: UPD17207
μ
PD17201A, 17207
13
3.4 NOTES ON USING RESET AND INT PINS
In addition to the functions shown in 3.1 PIN IDENTIFICATION, the RESET and INT pins also have a function
to set a test mode (for IC testing) in which the internal operations of the
μ
PD17207are 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
PD17207 may be set in the test mode if a noise exceeding V
DD
is applied.
For example, if the wiring length of the RESET or INT pin is too long, noise superimposed on the wiring line of the
pin may 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 RESET/INT pin
Connect capacitor between V
DD
and RESET/INT pin
V
DD
V
DD
V
DD
V
DD
RESET, INT
Diode with
low V
F
RESET, INT
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