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R8C/14 Group, R8C/15 Group 6. Voltage Detection Circuit
Rev.2.10 Jan 19, 2006 Page 30 of 253
REJ09B0164-0210
Figure 6.6 VW2C Register
Volta
g
e Monitor 2 Circuit Control Re
g
ister
(1)
Symbol Address After Reset
(8)
VW2C 0037h 00h
Bit Symbol Bit Name Function RW
NOTES :
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. Set the VW2C0 bit to “0” (disabled) under the conditions of the VCA13 bit in the VCA1 register set to “1” (VCC
≥
Vdet2 or voltage detection 2 circuit disabled), the VW2C1 bit set to “1” (digital filter disabled mode) and the VW2C7
bit set to “0” (when VCC reaches Vdet2 or above).
Set the VW2C0 bit to “0” (disabled) under the conditions of the VCA13 bit set to “0” (VCC < Vdet2), the VW2C1 bit
set to “1” (digital filter disabled mode) and the VW2C7 bit set to “1” (when VCC reaches Vdet2 or below).
b2
0 : Not detected
1 : Vdet2 pass detected
RW
b1 b0b7 b6 b5 b4 b3
VW2C0 RW
Voltage Monitor 2 Interrupt /
Reset Enable Bit
(6, 10)
0 : Disable
1 : Enable
0 : Digital filter enabled mode
(digital filter circuit enabled)
1 : Digital filter disabled mode
(digital filter circuit disabled)
RW
VW2C2
Voltage Change Detection
Flag
(3,4,8)
VW2C1
Voltage Monitor 2 Digital Filter
Disable Mode Select Bit
(2)
VW2C3
WDT Detection Flag
(4,8)
VW2F1 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
VW2F0 RW
0 : Not detected
1 : Detected
RW
VW2C6
Voltage Monitor 2 Circuit Mode
Select Bit
(5)
0 : Voltage monitor 2 interrupt mode
1 : Voltage monitor 2 reset mode
RW
VW2C7
Voltage Monitor 2 Interrupt /
Reset Generation Condition
Select Bit
(7,9)
0 : When VCC reaches Vdet2 or above
1 : When VCC reaches Vdet2 or below
RW
When the VW2C6 bit is set to “1” (voltage monitor 2 reset mode), set the VW2C7 bit to “1” (when VCC
reaches to Vdet2 or below)(do not set to “0”).
Set the PRC3 bit in the PRCR register to “1” (rewrite enable) before writing to this register.
When rew riting the VW2C register, the VW2C2 bit may be set to “1”. Set the VW2C2 bit to “0” after rew riting the
VW2C register.
When the voltage monitor 2 interrupt is used to exit stop mode and to return again, write “0” to the VW2C1
bit before w riting “1”.
This bit is enabled when the VCA27 bit in the VCA2 register is set to “1” (voltage detection 2 circuit
enabled).
Set this bit to “0” by a program. When writing “0” by a program, it is set to “0” (It remains unchanged even if it is set
to “1”).
This bit is enabled when the VW2C0 bit is set to “1” (voltage monitor 2 interrupt / enables reset).
The VW2C0 bit is enabled when the VCA27 bit in the VCA2 register is set to “1” (voltage detection 2 circuit
enabled). Set the VW2C0 bit to “0” (disable) when the VCA27 bit is set to “0” (voltage detection 2 circuit disabled).
The VW2C7 bit is enabled when the VW2C1 bit is set to “1” (digital filter disabled mode).
The VW2C2 and VW2C3 bits remain unchanged in the software reset, w atchdog timer reset and voltage monitor 2
reset.
- To our customers 1
- R8C/14 Group 3
- R8C/15 Group 3
- How to Use This Manual 5
- 3. M16C Family Documents 6
- Table of Contents 7
- 10. Protection 55 9
- 11. Interrupt 56 9
- 12. Watchdog Timer 78 9
- 13. Timers 83 9
- 14. Serial Interface 125 10
- 16. A/D Converter 168 10
- 18. Flash Memory Version 191 11
- 20. Precautions 235 11
- SFR Page Reference 13
- R8C/14 Group, R8C/15 Group 15
- 1. Overview 15
- 1.2 Performance Overview 16
- 1.3 Block Diagram 18
- Type No. R 5 F 21 14 4 D SP 19
- Type No. R 5 F 21 15 4 D SP 20
- 1.5 Pin Assignments 21
- 1.6 Pin Description 22
- 2.8.10 Reserved Bit 26
- 3. Memory 27
- 3.2 R8C/15 Group 28
- Table 4.2 SFR Information(2) 30
- Table 4.3 SFR Information(3) 31
- Table 4.4 SFR Information(4) 32
- 5. Reset 33
- to P3_5, P3_7 Input Port 34
- to P4_7 Input Port 34
- 5.1 Hardware Reset 35
- 5.1.2 Power on 35
- Power Supply 36
- Voltage Detection 36
- 5.2 Power-On Reset Function 37
- 5.3 Voltage Monitor 1 Reset 38
- 5.4 Voltage Monitor 2 Reset 38
- 5.5 Watchdog Timer Reset 38
- 5.6 Software Reset 38
- 6. Voltage Detection Circuit 39
- Figure 6.5 VW1C Register 43
- Figure 6.6 VW2C Register 44
- 6.1.1 Monitoring Vdet1 45
- 6.1.2 Monitoring Vdet2 45
- 6.2 Voltage Monitor 1 Reset 46
- 7. Processor Mode 49
- Figure 7.2 PM1 Register 50
- 9. Clock Generation Circuit 52
- Figure 9.2 CM0 Register 54
- Figure 9.3 CM1 Register 55
- Figure 9.4 OCD Register 56
- Figure 9.5 HRA0 Register 57
- 9.1 Main Clock 59
- 9.2 On-Chip Oscillator Clock 60
- 9.4 Power Control 62
- 9.4.1 Normal Operating Mode 62
- 9.4.2.4 Exiting Wait Mode 64
- 9.4.3 Stop Mode 65
- 9.4.3.1 Entering Stop Mode 65
- 9.4.3.3 Exiting Stop Mode 65
- 10. Protection 69
- 11. Interrupt 70
- 11.1.2 Software Interrupts 71
- 11.1.2.2 Overflow Interrupt 71
- 11.1.2.3 BRK Interrupt 71
- 11.1.5.1 Fixed Vector Tables 73
- 11.1.6 Interrupt Control 75
- Figure 11.4 INT0IC Register 76
- 11.1.6.1 I Flag 77
- 11.1.6.2 IR Bit 77
- 11.1.6.4 Interrupt Sequence 78
- Instruction in 79
- 11.1.6.7 Saving a Register 80
- 11.1.6.9 Interrupt Priority 81
- Level 0 (default value) 82
- 11.2 INT Interrupt 83
- 11.2.1 INT0 Interrupt 83
- 11.2.2 INT0 Input Filter 84
- Timer X Mode Register 85
- 11.2.4 INT3 Interrupt 86
- Figure 11.16 TCC1 Register 87
- 11.3 Key Input Interrupt 88
- Figure 11.18 KIEN Register 89
- 11.4 Address Match Interrupt 90
- 12. Watchdog Timer 92
- 13. Timers 97
- CNTRSEL=1 98
- CNTRSEL=0 98
- Figure 13.2 TXMR Register 99
- REJ09B0164-0210 100
- 13.1.1 Timer Mode 101
- 13.1.2 Pulse Output Mode 102
- 13.1.3 Event Counter Mode 104
- Input polarity selected to 112
- Figure 13.12 TZMR Register 113
- Figure 13.15 TCSS Register 116
- 13.2.1 Timer Mode 117
- • When count starts 119
- Timer Z Mode Register 127
- PREZ=01h, TZPR=01h, TZSC=02h 128
- 13.3 Timer C 129
- Timer C Register 131
- Figure 13.27 TCC0 Register 132
- Figure 13.28 TCC1 Register 133
- Figure 13.29 TCOUT Register 134
- 13.3.1 Input Capture Mode 135
- ←Measurement value 1 136
- ←Measurement value 2 136
- 13.3.2 Output Compare Mode 137
- 14. Serial Interface 139
- UART0 Bit Rate Register 141
- Set to “001b” 145
- 14.2.2 Bit Rate 153
- Figure 15.2 SSCRH Register 156
- SS Control Register L 157
- 15.1 Transfer Clock 163
- 15.3 Interrupt Requests 166
- 15.5.2 Data Transmit 169
- 15.5.3 Data Receive 171
- 15.5.4 Data Transmit/Receive 173
- I/O Pin and SS Shift Register 175
- 15.1.1 Association 175
- 15.6.2 Data Transmit 177
- 15.6.3 Data Receive 179
- 16. A/D Converter 182
- 16.1 One-Shot Mode 186
- 16.2 Repeat Mode 188
- 16.3 Sample and Hold 190
- 16.4 A/D Conversion Cycles 190
- 17. Programmable I/O Ports 193
- P1_0 to P1_3 194
- P1_6, P1_7 195
- P3_4, P3_5, P3_7 195
- P4_6/XIN 196
- P4_7/XOUT 196
- 17.4 Port setting 200
- 17.5 Unassigned Pin Handling 204
- 18. Flash Memory Version 205
- 18.2 Memory Map 207
- 18.3.1 ID Code Check Function 209
- Figure 18.4 OFS Register 210
- 18.4 CPU Rewrite Mode 211
- 18.4.1 EW0 Mode 212
- 18.4.2 EW1 Mode 212
- Full Status Check 213
- 18.4.2.10 FMR40 bit 214
- 18.4.2.11 FMR41 bit 214
- 18.4.2.12 FMR46 bit 214
- EW1 Mode Operating Procedure 217
- →wait until oscillation 218
- 18.4.3 Software Commands 219
- 18.4.3.1 Read Array Command 219
- 18.4.3.4 Program Command 220
- 18.4.3.5 Block Erase 221
- 18.4.4 Status Register 223
- 18.4.5 Full Status Check 224
- 18.5 Standard Serial I/O Mode 226
- 18.5.1 ID Code Check Function 226
- R8C/14, R8C/15 228
- 18.6 Parallel I/O Mode 230
- SSO(Output) 240
- SSI(Input) 240
- VCC = 5V 244
- VCC = 3V 248
- 20. Precautions 249
- 20.2 Interrupts 250
- 20.2.1 Reading Address 00000h 250
- 20.2.2 SP Setting 250
- 20.3 Clock Generation Circuit 253
- 20.4 Timers 254
- 20.4.1 Timers X and Z 254
- 20.4.2 Timer X 254
- 20.4.3 Timer Z 255
- 20.4.4 Timer C 255
- 20.5 Serial Interface 256
- 20.7 A/D Converter 258
- 20.8 Flash Memory Version 259
- 20.8.1 CPU Rewrite Mode 259
- 20.8.1.1 Operating Speed 259
- 20.8.1.3 Interrupts 259
- 20.8.1.9 Interrupt Request 260
- Generation during Auto-erase 260
- Operation in EW1 Mode 260
- 20.9 Noise 262
- Debugging Emulator 265
- Register Index 267
- REVISION HISTORY 268
- → “INT1” 271
- → Figure 18.16 276
- “8.16” → “8.56” 277
- Rev.2.10 Jan 19, 2006 278
- Renesas Technology Corp 278
- Hardware Manual 279
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