R5F211B1SP#U0 Renesas Electronics America, R5F211B1SP#U0 Datasheet - Page 68

• 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
7.1
7.1.1
7.1.2
7.1.3
Vdet1 cannot be monitored.
Set the VCA27 bit in the VCA2 register to 1 (voltage detection 2 circuit enabled). After td(E-A) has elapsed
(refer to 19. Electrical Characteristics), Vdet2 can be monitored by the VCA13 bit in the VCA1 register.
A digital filter can be used for monitoring the VCC input voltage. When the VW1C1 bit in the VW1C register
is set to 0 (digital filter enabled) for the voltage monitor 1 circuit and the VW2C1 bit in the VW2C register is set
to 0 (digital filter enabled) for the voltage monitor 2 circuit, the digital filter circuit is enabled.
fRING-S divided by 1, 2, 4, or 8 may be selected as a sampling clock.
The level of VCC input voltage is sampled every sampling clock cycle, and when the sampled input level
matches two times, the internal reset signal changes to “L” or a voltage monitor 2 interrupt request is generated.
VCC Input Voltage
Dec 08, 2006
Monitoring Vdet1
Monitoring Vdet2
Digital Filter
Page 50 of 315
7. Voltage Detection Circuit