R5F21162SP#U0 Renesas Electronics America, R5F21162SP#U0 Datasheet - Page 82

• Manufacturer Part Number: R5F21162SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/16r

Specifications of R5F21162SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• 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 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/16 Group, R8C/17 Group
Rev.2.10
REJ09B0169-0210
Figure 11.9
11.1.6.8
11.1.6.9
When the REIT instruction is executed at the end of an interrupt routine, the FLG register and PC,
which have been saved to the stack, are automatically returned. The program, executed before the
interrupt request has been acknowledged, starts running again.
Return the register saved by a program in an interrupt routine using the POPM instruction or others
before the REIT instruction.
If two or more interrupt requests are generated while executing one instruction, the interrupt with the
higher priority is acknowledged.
Set the ILVL2 to ILVL0 bits to select the desired priority level for maskable interrupts (peripheral
functions). However, if two or more maskable interrupts have the same priority level, their interrupt
priority is resolved by hardware, with the higher priority interrupt acknowledged in hardware.
The priority levels of special interrupts such as reset (reset has the highest priority) and watchdog
timer are set by hardware. Figure 11.9 shows the Interrupt Priority Levels of Hardware Interrupt.
The interrupt priority does not affect software interrupts. The microcomputer jumps to the interrupt
routine when the instruction is executed.
Jan 19, 2006
Returning from an Interrupt Routine
Interrupt Priority
Interrupt Priority Levels of Hardware Interrupt
Page 67 of 254
Oscillation Stop Detection
Peripheral Function
Voltage Monitor 2
Watchdog Timer
Address Match
Single Step
Reset
High
Low
11. Interrupt