Renesas M16C/62P Series Hardware Manual page 61

M16C/62P Group (M16C/62P, M16C/62PT)
Voltage Detection Register 1
b7 b6 b5 b4 b3 b2 b1 b0
0 0 0 0 0 0 0
NOTES :
1. The VC13 bit is useful w hen the VC27 bit in the VCR2 register is set to "1" (low voltage detection circuit enable).
The VC13 bit is alw ays "1" (VCC1 ≥ Vdet4) w hen the VC27 bit is set to "0" (low voltage detection circuit disable).
2. This register dose not change at softw are reset, w atchdog timer reset and oscillation stop detection reset.
Voltage Detection Register 2
b7 b6 b5 b4 b3 b2 b1 b0
0 0 0 0 0 0
NOTES :
1. Write to this register after setting the PRC3 bit in the PRCR register to "1" (w rite enable).
2. To use low voltage detection (hardw are reset 2), set the VC26 bit to "1" (reset level detection circuit enable).
3. VC26 bit is disabled in stop mode (the microcomputer is not reset even if the voltage input to VCC1 pin becomes
low er than Vdet3).
4. Where the VC13 bit in the VCR1 register and D42 bit in the D4INT register are used or the D40 bit is set to "1" (low
voltage detection interrupt enable), set the VC27 bit to "1" (low voltage detection circuit enable).
5. This register dose not change at softw are reset, w atchdog timer reset and oscillation stop detection reset.
6. The detection circuit dose not start operation until td(E-A) elapses after the VC26 bit, or VC27 bit is set to "1".
Figure 6.2 VCR1 and VCR2 Registers
Rev.2.41 Jan 10, 2006
REJ09B0185-0241
http://www.xinpian.net
Symbol
VCR1
Bit Name
Bit Symbol
— Reserved Bit
(b2-b0)
Low Voltage Monitor Flag
VC13
— Reserved Bit
(b7-b4)
(1)
Symbol
VCR2
Bit Name
Bit Symbol
— Reserved Bit
(b5-b0)
Reset Level Monitor Bit
VC26
Low Voltage Monitor Bit
VC27
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Address
0019h
Set to "0"
(1)
0 : VCC1 < Vdet4
1 : VCC1 ≥ Vdet4
Set to "0"
Address
001Ah
Set to "0"
(2, 3, 6)
0 : Disable reset level detection circuit
1 : Enable reset level detection circuit
(4, 6)
0 : Disable low voltage detection circuit
1 : Enable low voltage detection circuit
6. Voltage Detection Circuit
(2)
After Reset
00001000b
Function
(5)
After Reset
00h
Function
010-62245566 13810019655
RW
RW
RO
RW
RW
RW
RW
RW