參數(shù)資料
型號: M34571G4
廠商: Renesas Technology Corp.
英文描述: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述: 單芯片4位微機的CMOS
文件頁數(shù): 123/126頁
文件大小: 1627K
代理商: M34571G4
Rev.1.02
REJ03B0179-0102
May 25, 2007
Page 123 of 124
4571 Group
Voltage drop detection circuit characteristics
Note 1.The detection voltage (V
RST
) is defined as the voltage when reset occurs when the supply voltage (V
DD
) is falling.
Note 2.The detection voltage (V
RST
+) is defined as the voltage when reset is released when the supply voltage (V
DD
) is rising from reset
occurs.
Note 3.When the supply voltage goes lower than the detection voltage (V
INT
), the voltage drop detection circuit interrupt request flag
(VDF) is set to “1“.
Note 4.I
RST
is added to I
DD
(power current).
Note 5.The detection time (T
RST
) is defined as the time until reset occurs when the supply voltage (V
DD
) is falling to [V
RST
-
0.1V].
Basic timing diagram
Table 29 Voltage drop detection circuit characteristics (Ta = –20
°
C to 85
°
C, unless otherwise noted)
Symbol
Parameter
Test conditions
Limits
Typ.
1.65
Unit
Min.
Max.
V
RST
-
Detection voltage
(reset occurs) (Note 1)
Ta = 25
°
C
20
°
C
Ta
<
0
°
C
0
°
C
Ta
<
50
°
C
50
°
C
Ta
85
°
C
Ta = 25
°
C
20
°
C
Ta
<
0
°
C
0
°
C
Ta
<
50
°
C
50
°
C
Ta
85
°
C
Ta = 25
°
C
20
°
C
Ta
<
0
°
C
0
°
C
Ta
<
50
°
C
50
°
C
Ta
85
°
C
V
1.6
1.3
1.1
2.2
2.1
1.8
V
RST+
Detection voltage
(reset release) (Note 2)
1.75
V
1.7
1.4
1.2
2.3
2.2
1.9
V
INT
Detection voltage
(Interrupt occurs) (Note 3)
1.85
V
1.8
1.5
1.3
2.4
2.3
2.2
V
RST
+
V
RST
-
I
RST
Detection voltage hysteresis
Voltage drop detection circuit
operation current (Note 4)
0.1
40
20
7
0.2
V
V
DD
= 5V
V
DD
= 3V
V
DD
= 1.65V
V
DD
(V
RST
-
0.1V)
80
40
15
1.2
μ
A
T
RST
Detection time (Note 5)
ms
System clock
STCK
Port output
D
0
to D
4
P0
0
to P0
3
P1
0
to P1
3
P2
0
, P2
1
P3
0
, P3
1
, C
Port input
D
0
to D
4
P0
0
to P0
3
P1
0
to P1
3
P2
0
, P2
1
P3
0
, P3
1
, K
Interrupt input
INT0, INT1
Parameter
Pin name
Machine cycle
Mi
Mi + 1
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