參數(shù)資料
型號(hào)： UPD75112CW
廠商： NEC Corp.
英文描述： 4-Bit Single Chip-Microcomputer
中文描述： 4位單片微機(jī)
文件頁(yè)數(shù)： 10/56頁(yè)
文件大小： 499K
代理商： UPD75112CW
10
μ
PD75112(A), 75116(A)
3.5 Caution Relating to Use of P00/INT4 Pin and RESET Pin
In addition to the functions described in sections 3.1
and 3.2, the P00/INT4 pin and the RESET pin have the
function to set the IC test mode for testing the
μ
PD75116(A) internal operations.
When a voltage larger than V
DD
is applied to one of
these two pins, the test mode is set. Thus, if noise
exceeding V
DD
is applied even during normal opera-
tions, the test mode is set and normal operations may
be discontinued.
For example, if a cable from the P00/INT4 or RESET pin
is too long, inter-wiring noise may be applied to the pin,
the pin voltage may become larger than V
DD
, causing
malfunctioning.
Thus, carry out wiring to minimize inter-wiring noise. If
the noise cannot be suppressed completely, carry out
the following countermeasure against noise using an
externally mounted component.
o Connect a diode with low V
F
(max 0.3 V)between V
DD
s
Diode with low V
F
o Connect acapacitor between V
DD
s
3.4 Recommended Connection of Unused Pins
Pin
PTH00 to PTH03
TI0
TI1
P00
P01 to P03
P10 to P13
P20 to P23
P30 to P33
P40 to P43
P50 to P53
P60 to P63
P70 to P73
P80 to P83
P90 to P93
P120 to P123
P130 to P133
P140 to P143
RESET
NC
*1
: Only when a power-on reset generator is built in by mask
option, connect t V
DD
.
2
: When the PWB is shared with the
μ
PD75P116, connect the
NC pin to V
DD
directly.
Recommended Connecting Method
Connect to V
SS
or V
DD
Connect to V
SS
Connect to V
SS
or V
DD
Connect to V
SS
Input state
Output state: Leave open
: Connect to V
SS
or V
DD
Connect to V
DD
*1
Leave open or connect to V
DD
*2
V
DD
V
DD
P00/INT4, RESET
V
DD
V
DD
P00/INT4, RESET
相關(guān)PDF資料
PDF描述
UPD75112GF 4-Bit Single Chip-Microcomputer
UPD75112GFA 4-Bit Single Chip-Microcomputer
UPD75116 4-Bit Single Chip-Microcomputer
UPD75116A 4-Bit Single Chip-Microcomputer
UPD75116CW 4-Bit Single Chip-Microcomputer
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