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M32C85 데이터시트(PDF) 73 Page - Renesas Technology Corp

부품명 M32C85
상세설명  16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES
PDF  542 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

M32C85 데이터시트(HTML) 73 Page - Renesas Technology Corp

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6. Voltage Detection Circuit
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6. Voltage Detection Circuit
The voltage detection circuit consists of the reset level detection circuit and the low voltage detection circuit.
The reset level detection circuit monitors the voltage applied to the VCC1 pin. The microcomputer is reset if
the reset level detection circuit detects VCC1 is Vdet3 or below. This circuit is disabled when the microcom-
puter is in stop mode.
The voltage detection circuit also monitors the voltage applied to the VCC1 pin. The low voltage detection
signal is generated when the low voltage detection circuit detects VCC1 is above or below Vdet4. This
signal generates the low voltage detection interrupt. The VC13 bit in the VCR1 register determines whether
VCC1 is above or below Vdet4.
The voltage detection circuit is available when VCC1=4.2V to 5.5V.
Figure 6.1 shows a block diagram of the voltage detection circuit.
The voltage detection circuit in M32C/85T cannot be used.
However, the cold start-up/warm start-up determine function is available.
NOTE
Figure 6.1 Voltage Detection Circuit Block Diagram
b7 b6
VCR2 Register
RESET
CM10 Bit=1
(Stop Mode)
+
≥Vdet3
+
≥Vdet4
E
Noise Rejection
Low Voltage
Detection Signal
b3
VCR1 Register
VC13 Bit
>T
Q
1 shot
td(S-R)
Internal Reset Signal
("L" active)
Wait Time to Release
Brown-out Detection
Reset
E
VCC1
Low Voltage
Detection Circuit
Reset Level
Detection Circuit



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