M16C62P_06 Datasheet, PDF (60/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
6. Voltage Detection Circuit
6. Voltage Detection Circuit
Note
The M16C/62PT do not use the voltage detection circuit.
However, the cold start-up/warm start-up determine function is available.
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 microcomputer 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=5.0V.
Figure 6.1 shows a Voltage Detection Circuit Block.
.
RESET
VCR2 Register
b7 b6
CM10 Bit=1
(Stop Mode)
Reset Level
Detection Circuit
+
≥Vdet3
E
1 shot
>T
Brown-out Detection Reset
(Hardware Reset 2
Release Wait Time)
td(S-R)
Q
Internal Reset Signal
(“L” active)
VCC1
Figure 6.1
+
≥Vdet4
E
Noise Rejection
Low Voltage
Detection Circuit
Voltage Detection Circuit Block
Low Voltage
Detection Signal
VCR1 Register
b3
VC13 Bit
Rev.2.41 Jan 10, 2006 Page 45 of 390
REJ09B0185-0241