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參數(shù)資料
| 型號(hào)： | μPD78070A |
| 廠商： | NEC Corp. |
| 英文描述： | 8 Bit Single Chip Microcontrollers(8位單片微控制器) |
| 中文描述： | 8位單片機(jī)微控制器（8位單片微控制器） |
| 文件頁數(shù)： | 73/74頁 |
| 文件大?。?/td> | 481K |
| 代理商： | ΜPD78070A |
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m
PD78070A
72
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 trans-
ported 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. Imme-
diately 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.
FIP and IEBus are trademarks of NEC Corporation.
MS-DOS and Windows are trademarks of Microsoft Corporation.
IBM DOS, PC/AT, and PC DOS are trademarks of IBM Corporation.
HP9000 series 300, HP9000 series 700, and HP-UX are trademarks of Hewlett-Packard Company.
SPARCstation is a trademark of SPARC International, Inc.
SunOS is a trademark of Sun Microsystems, Inc.
NEWS and NEWS-OS are trademarks of Sony Corporation.
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