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參數(shù)資料
| 型號： | UPD784224YGC |
| 廠商： | NEC Corp. |
| 英文描述： | 16/8-BIT SINGLE-CHIP MICROCONTROLLERS |
| 中文描述： | 16/8-BIT單晶片微控制器 |
| 文件頁數(shù)： | 90/92頁 |
| 文件大小： | 687K |
| 代理商： | UPD784224YGC |
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90
μ
PD784224, 784225, 784224Y, 784225Y
Data Sheet U12376EJ1V0DS00
NOTES FOR CMOS DEVICES
1
PRECAUTION AGAINST ESD FOR SEMICONDUCTORS
Note:
Strong electric field, when exposed to a MOS device, can cause destruction of the gate oxide and
ultimately degrade the device operation. Steps must be taken to stop generation of static electricity
as much as possible, and quickly dissipate it once, when it has occurred. Environmental control
must be adequate. When it is dry, humidifier should be used. It is recommended to avoid using
insulators that easily build static electricity. Semiconductor devices must be stored and transported
in an anti-static container, static shielding bag or conductive material. All test and measurement
tools including work bench and floor should be grounded. The operator should be grounded using
wrist strap. Semiconductor devices must not be touched with bare hands. Similar precautions need
to be taken for PW boards with semiconductor devices on it.
2
HANDLING OF UNUSED INPUT PINS FOR CMOS
Note:
No connection for CMOS device inputs can be cause of malfunction. If no connection is provided
to the input pins, it is possible that an internal input level may be generated due to noise, etc., hence
causing malfunction. CMOS devices behave differently than Bipolar or NMOS devices. Input levels
of CMOS devices must be fixed high or low by using a pull-up or pull-down circuitry. Each unused
pin should be connected to V
DD
or GND with a resistor, if it is considered to have a possibility of
being an output pin. All handling related to the unused pins must be judged device by device and
related specifications governing the devices.
3
STATUS BEFORE INITIALIZATION OF MOS DEVICES
Note:
Power-on does not necessarily define initial status of MOS device. Production process of MOS
does not define the initial operation status of the device. Immediately after the power source is
turned ON, the devices with reset function have not yet been initialized. Hence, power-on does
not guarantee out-pin levels, I/O settings or contents of registers. Device is not initialized until the
reset signal is received. Reset operation must be executed immediately after power-on for devices
having reset function.
IEBus is a trademark of NEC Corporation.
Windows is a registered trademark or a trademark of Microsoft Corporation in the United States and/or other
countries.
PC/AT is a trademark of International Business Machines Corporation.
HP9000 series 700 and HP-UX are trademarks of Hewlett-Packard Company.
SPARCstation is a trademark of SPARC International, Inc.
Solaris and SunOS are trademarks of Sun Microsystems, Inc.
NEWS and NEWS-OS are trademarks of Sony Corporation.
Caution
This product contains an I
2
C bus interface circuit.
When using the I
2
C bus interface, notify its use to NEC when ordering custom code. NEC can
guarantee the following only when the customer informs NEC of the use of the interface:
Purchase of NEC I
2
C components conveys a license under the Philips I
2
C Patent Rights to use
these components in an I
2
C system, provided that the system conforms to the I
2
C Standard
Specification as defined by Philips.
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