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Y1
φL16(D)
TR0
φΚ11(D)
Decreased voltage
detection setting data
Note: Decreased voltage detection voltage detected
V
pin level.
DD
Note: Any
detection voltage will cause the STOP F/F to
be set to "1"; and the CPU will stop as a result
of decreased voltage detection.
Note: The decreased voltage detection value is a
standard value. The constant voltage of the
V
pin is used as the standard voltage of the
EE
decreased voltage detection circuit. Since this
V
voltage varies from product to product,
EE
the decreased voltage detection value also
varies at the same time.
Note: If a high-speed oscillator clock is being used
for the CPU clock, assign the decreased
voltage setting data to between 0H ∼ 6H (0.85
V ∼ 1.00 V). Do not make any other setting.
(4)
Decreased voltage detection, power supply off detection timing
V CPU 端子
V CPU Pin
V DB 端子
V DB Pin
V DD Pin
V DD 端子
端子
X
X
Pin
OUT1
OUT1
CPU
CPU動作
operation
Flag reset execution
フラグリセット実行
(STOP F/F Reset = 1の実行)
(execution of STOP F/F Reset=1)
STOP F/F
V
OFF F/F
DD
Note 1: Decrease voltage is detected and CPU operation is suspended. It is then necessary to detect the V
power supply voltage. When performing power off, therefore, ensure that the fall time from the
decreased voltage detection voltage to the detection of the power supply voltage (approximately 0.5 V)
is equal to or greater than the timing period for operation of decreased voltage detection (i.e., two or 16
instruction cycles). Failure to do so will cause CPU malfunction.
Note 2: STOP F/F is reset during standby time.
Y2
Y4
Y8
TR1
TR2
TR3
fall
below
the
decreased
減電圧設定電圧
Decreased voltage
setting voltage
CPU動作
CPU operation
CPU停止
CPU stop
CPU停止
CPU stop
（ １）
注
(Note 1)
割り込みを許可していると STOP F/Fの立ち上がりで割り込みが発行されます
、
When interrupt has been permitted, interrupt is issued using STOP F/F.
Example of timing operation
TR3 TR2 TR1 TR0 Data (HEX)
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
voltage
0
1
0
0
0
1
0
1
0
1
1
0
0
1
1
1
1
0
0
0
1
0
0
1
1
0
1
0
1
0
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
約0.5V以下になるとバックアップ動作し この電圧以上
Backup operates on a setting of approximately 0.5 V or less
but will be canceled if the voltage exceeds this value.
の電圧が印加されると解除されます
電源オフ検出
Power supply
Stand-by
スタンバイ(約100ms)
（
OFF detection
バックアップ
）
(About 100 ms)
(Backup)
（ ２）
注
。
39
TC9349AFG
Decreased voltage
detection voltage (V)
0
0.850
1
0.875
2
0.900
3
0.925
4
0.950
5
0.975
6
1.000
7
1.025
8
1.050
9
1.075
A
1.100
B
1.125
C
1.150
D
1.175
E
1.200
F
1.225
、
。
CPU
CPU動作
operation
CPU stop
CPU停止
DD
2006-02-24
GND
GND
GND
CPU
CPU動作
operation
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