R5F211B1SP#U0 Renesas Electronics America, R5F211B1SP#U0 Datasheet - Page 71

• Manufacturer Part Number: R5F211B1SP#U0
• Description: IC R8C MCU FLASH 4K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/1Br

Specifications of R5F211B1SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SIO, SSU, 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 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K5211B4S001BE - KIT STARTER FOR R8C/18191A1BR0K5211B4S000BE - KIT DEV EVALUATION R8C/1BR0E521174CPE10 - EMULATOR COMPACT R8C/18/19/1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/1A Group, R8C/1B Group
Rev.1.30
REJ09B0252-0130
7.3
Table 7.3
NOTES:
Table 7.3 lists the Setting Procedure of Voltage Monitor 2 Interrupt and Voltage Monitor 2 Reset Associated Bits.
Figure 7.9 shows an Operating Example of Voltage Monitor 2 Interrupt and Voltage Monitor 2 Reset. To use
voltage monitor 2 interrupt or voltage monitor 2 reset to exit stop mode, set the VW2C1 bit in the VW2C register to
1 (digital filter disabled).
1. Set the VW2C7 bit to 1 (when VCC reaches Vdet2 or below) for the voltage monitor 2 reset.
2. When the VW2C0 bit is set to 0 (disabled), steps 3, 4 and 5 can be executed simultaneously (with 1
Step
3
4
5
1
2
6
7
8
9
(2)
(2)
(2)
instruction).
Voltage Monitor 2 Interrupt and Voltage Monitor 2 Reset
Dec 08, 2006
Associated Bits
Set the VCA27 bit in the VCA2 register to 1 (voltage detection 2 circuit enabled).
Wait for td(E-A)
Select the sampling clock of the digital filter
by bits VW2F0 to VW2F1 in the VW2C
register.
Set the VW2C1 bit in the VW2C register to 0
(digital filter enabled).
Set the VW2C6 bit in
the VW2C register to
0 (voltage monitor 2
interrupt mode).
Set the VW2C2 bit in the VW2C register to 0 (passing of Vdet2 is not detected).
Set the CM14 bit in the CM1 register to 0
(low-speed on-chip oscillator on).
Wait for 4 cycles of the sampling clock of the
digital filter
Set the VW2C0 bit in the VW2C register to 1 (voltage monitor 2 interrupt/reset enabled).
Setting Procedure of Voltage Monitor 2 Interrupt and Voltage Monitor 2 Reset
Voltage Monitor 2
Interrupt
Page 53 of 315
When Using Digital Filter
Set the VW2C6 bit in
the VW2C register to
1 (voltage monitor 2
reset mode).
Voltage Monitor 2
Reset
Select the timing of the interrupt and reset
request by the VW2C7 bit in the VW2C
register
Set the VW2C1 bit in the VW2C register to 1
(digital filter disabled).
Set the VW2C6 bit in
the VW2C register to
0 (voltage monitor 2
interrupt mode).
−
− (No wait time)
Voltage Monitor 2
Interrupt
(1)
When Not Using Digital Filter
.
7. Voltage Detection Circuit
Set the VW2C6 bit in
the VW2C register to
1 (voltage monitor 2
reset mode).
Voltage Monitor 2
Reset