R5F211B1SP#U0 Renesas Electronics America, R5F211B1SP#U0 Datasheet - Page 97

• 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
12.1.2
12.1.2.1
12.1.2.2
12.1.2.3
12.1.2.4
A software interrupt is generated when an instruction is executed. Software interrupts are non-maskable.
The undefined instruction interrupt is generated when the UND instruction is executed.
The overflow interrupt is generated when the O flag is set to 1 (arithmetic operation overflow) and the INTO
instruction is executed. Instructions that set the O flag are: ABS, ADC, ADCF, ADD, CMP, DIV, DIVU,
DIVX, NEG, RMPA, SBB, SHA, and SUB.
A BRK interrupt is generated when the BRK instruction is executed.
An INT instruction interrupt is generated when the INT instruction is executed. The INT instruction can select
software interrupt numbers 0 to 63. Software interrupt numbers 4 to 31 are assigned to the peripheral function
interrupt. Therefore, the MCU executes the same interrupt routine when the INT instruction is executed as
when a peripheral function interrupt is generated. For software interrupt numbers 0 to 31, the U flag is saved to
the stack during instruction execution and the U flag is set to 0 (ISP selected) before the interrupt sequence is
executed. The U flag is restored from the stack when returning from the interrupt routine. For software interrupt
numbers 32 to 63, the U flag does not change state during instruction execution, and the selected SP is used.
Dec 08, 2006
Software Interrupts
Undefined Instruction Interrupt
Overflow Interrupt
BRK Interrupt
INT Instruction Interrupt
Page 79 of 315
12. Interrupts