R5F21132FP#U0 Renesas Electronics America, R5F21132FP#U0 Datasheet - Page 61

• Manufacturer Part Number: R5F21132FP#U0
• Description: IC R8C MCU FLASH 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/13r

Specifications of R5F21132FP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521134EPB00 - KIT EMULATOR PROBE FOR PC7501R0E521134CPE00 - EMULATOR COMPACT R8C/13
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/13 Group
Rev.1.20
REJ09B0111-0120
10.1.2 Software Interrupts
A software interrupt occurs when executing certain instructions. Software interrupts are non-
maskable interrupts.
• Undefined Instruction Interrupt
• Overflow Interrupt
• BRK Interrupt
• INT Instruction Interrupt
Jan 27, 2006
An undefined instruction interrupt occurs when executing the UND instruction.
An overflow interrupt occurs when executing the INTO instruction with the O flag set to “1” (the
operation resulted in an overflow). The following are instructions whose O flag changes by arith-
metic:
ABS, ADC, ADCF, ADD, CMP, DIV, DIVU, DIVX, NEG, RMPA, SBB, SHA, SUB
A BRK interrupt occurs when executing the BRK instruction.
An INT instruction interrupt occurs when executing the INT instruction. Software interrupt numbers 0
to 63 can be specified for the INT instruction. Because software interrupt Nos. 4 to 31 are assigned
to peripheral function interrupts, the same interrupt routine as for peripheral function interrupts can
be executed by executing the INT instruction.
In software interrupt numbers 0 to 31, the U flag is saved to the stack during instruction execution
and is cleared to “0” (ISP selected) before executing an interrupt sequence. The U flag is restored
from the stack when returning from the interrupt routine. In software interrupt numbers 32 to 63, the
U flag does not change state during instruction execution, and the SP then selected is used.
page 48 of 205
10.1 Interrupt Overview