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R5F21143DSP View Datasheet(PDF) - Renesas Electronics

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R5F21143DSP Datasheet PDF : 277 Pages
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R8C/14 Group, R8C/15 Group
6. Voltage Detection Circuit
Voltage Detection Register 1
b7 b6 b5 b4 b3 b2 b1 b0
0 0 0 0 0 0 0 Symbol
Address
After Reset(2)
VCA1
0031h
00001000b
Bit Symbol
Bit Name
Function
RW
Reserved Bit
Set to “0”
(b2-b0)
RW
Voltage Detection 2 Signal Monitor 0 : VCC < Vdet2
VCA13 Flag(1)
1 : VCC Vdet2 or voltage detection 2
RO
circuit disabled
Reserved Bit
Set to “0”
(b7-b4)
RW
NOTES :
1. The VCA13 bit is enabled w hen the VCA27 bit in the VCA2 register is set to “1” (voltage detection 2 circuit enabled).
The VCA13 bit is set to “1” (VCC Vdet 2) w hen the VCA27 bit in the VCA2 register is set to “0” (voltage detection 2
circuit disabled).
2. The softw are reset, w atchdog timer reset and voltage monitor 2 reset do not affect this register.
Voltage Detection Register 2(1)
b7 b6 b5 b4 b3 b2 b1 b0
After Reset(4)
000000
Symbol
VCA2
Address
0032h
Bit Symbol
Bit Name
Reserved Bit
(b5-b0)
Hardw are Reset : 00h
Pow er-On Reset, Voltage Monitor 1Reset
: 01000000b
Function
RW
Set to “0”
RW
Voltage Detection 1 Enable Bit(2)
0 : Voltage detection 1 circuit disabled
VCA26
1 : Voltage detection 1 circuit enabled
RW
Voltage Detection 2 Enable Bit(3)
0 : Voltage detection 2 circuit disabled
VCA27
1 : Voltage detection 2 circuit enabled
RW
NOTES :
1. Set the PRC3 bit in the PRCR register to “1” (w rite enable) before w riting to this register.
2. When using the voltage monitor 1 reset, set the VCA26 bit to “1”.
Af ter the VCA26 bit is set f rom “0” to “1”, the voltage detection circuit elapses f or td(E-A) bef ore starting operation.
3. When using the voltage monitor 2 interrupt / reset or the VCA13 bit in the VCA1 register, set the VCA27 bit to “1”.
After the VCA27 bit is f rom “0” to “1”, the voltage detection circuit elapses f or td(E-A) bef ore starting operation.
4. The softw are reset, w atchdog timer reset and voltage monitor 2 reset do not affect this register.
Figure 6.4 VCA1 and VCA2 Registers
Rev.2.10 Jan 19, 2006 Page 28 of 253
REJ09B0164-0210
 

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