參數(shù)資料
型號(hào)： 4250
英文描述： Low-Cost, 2.7V to 5.5V Temperature Switches in a SOT23
中文描述： 4250組數(shù)據(jù)表數(shù)據(jù)表652K/NOV.30.97
文件頁(yè)數(shù)： 26/59頁(yè)
文件大小： 652K
代理商： 4250
25
MITSUBISHI MICROCOMPUTERS
4250 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
Fig. 22 Power-on reset circuit example
(2) Internal state at reset
Table 11 shows port state at reset, and Figure 23 shows
internal state at reset (they are retained after system is released
from reset).
Table 11 Port state at reset
Name
D
0
, D
1
, D
2
/C, D
3
/K
S
0
–S
3
G
0
/INT, G
1
/T
OUT
G
2
, G
3
F
0
, F
1
Note: Output latch is set to “1.”
The contents of timers, registers, flags and RAM except shown
in Figure 23 are undefined, so set the initial value to them.
State
High impedance
(Note)
Function
D
0
, D
1
, D
2
/C, D
3
/K
S
0
–S
3
G
0
/INT, G
1
G
2
, G
3
F
0
, F
1
(1) Power-on reset
Reset can be automatically performed at power on (power-on
reset) by connecting a resistor, a diode, and a capacitor to
RESET
pin. Connect
RESET
pin and the external circuit at the
shortest distance.
V
DD
V
DD
RESET pin voltage
Internal reset signal
Power-on
RESET
pin
This symbol represents a parasitic diode.
Note: Applied potential to RESET pin
must be 7 V or less.
Internal reset
signal
Reset state
Reset released
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