
R8C/14 Group, R8C/15 Group 6. Voltage Detection Circuit
Rev.2.10 Jan 19, 2006 Page 29 of 253
REJ09B0164-0210
Figure 6.5 VW1C Register
Voltage Monitor 1 Circuit Control Register
(1)
Symbol Address After Reset
(2)
VW1C 0036h Hardware Reset : 0000X000b
Power-On Reset, Voltage Monitor 1 Reset :
0100X001b
Bit Symbol Bit Name Function RW
NOTES :
1.
2.
3.
b3 b2
Set to “0”.
RW
b1 b0
0
b7 b6 b5 b4
VW1C0 RW
Voltage Monitor 1 Reset Enable
Bit
(3)
0 : Disable
1 : Enable
0 : Digital filter enabled mode
(digital filter circuit enabled)
1 : Digital filter disabled mode
(digital filter circuit disabled)
RW
VW1C2
Reserved Bit
VW1C1
Voltage Monitor 1 Digital Filter
Disable Mode Select Bit
—
(b3)
Reserved Bit
VW1F1 RW
Sampling Clock Select Bit
b5 b4
0 0 : fRING-S divide-by-1
0 1 : fRING-S divide-by-2
1 0 : fRING-S divide-by-4
1 1 : fRING-S divide-by-8
VW1F0 RW
When read, its content is indeterminate.
RO
VW1C6
Voltage Monitor 1 Circuit Mode
Select Bit
When the VW1C0 bit is set to “1” (enables
voltage monitor 1 reset), set to “1”.
RW
VW1C7
Voltage Monitor 1 Reset
Generation Condition Select Bit
When the VW1C1 bit is set to “1” (digital filter
disabled mode), set to “1”.
RW
Set the PRC3 bit in the PRCR register to “1” (write enable) before writing to this register.
When rew riting the VW1C register, the VW1C2 bit may be set to “1”. Set the VW1C2 bit to “0” after rewriting the
VW1C register.
The value after reset remains unchanged in software reset, watchdogi timer reset and voltage monitor 2 reset.
The VW1C0 bit is enabled when the VCA26 bit in the VCA2 register is set to “1” (voltage detection 1 circuit
enabled). Set the VW1C0 bit to “0” (disable), when the VCA26 bit is set to “0” (voltage detection 1 circuit disabled).
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