R5F21191SP#U0 Renesas Electronics America, R5F21191SP#U0 Datasheet - Page 62

• Manufacturer Part Number: R5F21191SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/19r

Specifications of R5F21191SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x1b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/18 Group, R8C/19 Group
Rev.1.30
REJ09B0222-0130
Figure 7.6
Voltage Monitor 2 Circuit Control Register
b7 b6 b5 b4
NOTES:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Set the PRC3 bit in the PRCR register to 1 (rew rite enable) before w riting 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, w rite 0 to the VW2C1bit before
w riting 1.
This bit is enabled w hen 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 0 is w ritten by a program, it is set to 0 (and remains unchanged even if 1 is
w ritten to it).
This bit is enabled w hen the VW2C0 bit is set to 1 (voltage monitor 2 interrupt/enabled reset).
The VW2C0 bit is enabled w hen the VCA27 bit in the VCA2 register is set to 1 (voltage detection 2 circuit
enabled). Set the VW2C0 bit to 0 (disable) w hen the VCA27 bit is set to 0 (voltage detection 2 circuit disabled).
The VW2C7 bit is enabled w hen the VW2C1 bit is set to 1 (digital filter disabled mode).
Bits VW2C2 and VW2C3 remain unchanged after a softw are reset, w atchdog timer reset, or voltage monitor 2
When the VW2C6 bit is set to 1 (voltage monitor 2 reset mode), set the VW2C7 bit to 1 (w hen VCC reaches Vdet2 or
below ). (Do not set to 0.)
Set the VW2C0 bit to 0 (disabled) w hen the VCA13 bit in the VCA1 register is set to 1 (VCC ≥ Vdet2 or voltage
detection 2 circuit disabled), the VW2C1 bit is set to 1 (digital filter disabled mode), and the VW2C7 bit is set to 0
(w hen VCC reaches Vdet2 or above).
Set the VW2C0 bit to 0 (disabled) w hen the VCA13 bit is set to 0 (VCC < Vdet2), the VW2C1 bit is set to 1 (digital
filter disabled mode), and the VW2C7 bit is set to 1 (w hen VCC reaches Vdet2 or below ).
Apr 14, 2006
b3
b2
VW2C Register
b1 b0
Bit Symbol
VW2C0
VW2C2
VW2C3
VW2C6
VW2C7
VW2C1
VW2F0
VW2F1
Symbol
VW2C
Page 45 of 233
Voltage monitor 2 interrupt/reset
enable bit
Voltage monitor 2 digital filter
disable mode select bit
Voltage change detection flag
WDT detection flag
Sampling clock select bits
Voltage monitor 2 circuit mode
select bit
Voltage monitor 2 interrupt/reset
generation condition select bit
(5)
(6, 10)
(1)
Address
Bit Name
0037h
(4, 8)
(2)
(7, 9)
(3, 4, 8)
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
0 : Disable
1 : Enable
0 : Digital filter enabled mode
1 : Digital filter disabled mode
0 : Not detected
1 : Vdet2 crossing detected
0 : Not detected
1 : Detected
0 : Voltage monitor 2 interrupt mode
1 : Voltage monitor 2 reset mode
0 : When VCC reaches Vdet2 or above.
1 : When VCC reaches Vdet2 or below .
(digital filter circuit enabled)
(digital filter circuit disabled)
After Reset
Function
00h
7. Voltage Detection Circuit
(8)
RW
RW
RW
RW
RW
RW
RW
RW
RW