R5F21256SNFP#U0 Renesas Electronics America, R5F21256SNFP#U0 Datasheet - Page 278

• Manufacturer Part Number: R5F21256SNFP#U0
• Description: IC R8C MCU FLASH 32K 52LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/25r

Specifications of R5F21256SNFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 52-LQFP
• For Use With: R0K521256S000BE - KIT EVAL STARTER FOR R8C/25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Rev.2.00 Oct 17, 2005
REJ09B0001-0200
Chapter 5
Figure 5.6.1 Multiple Interrupts
Time
Interrupt priority level = 3
Interrupt priority level = 5
Interrupt priority level = 2
Interrupt request
generated
Interrupt 1
Interrupt 3
Interrupt 2
Interrupts
Reset
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Main routine
IPL = 0
I = 0
I = 1
Interrupt 1
Interrupt 3
IPL = 3
REIT
REIT
IPL = 0
IPL = 2
IPL = 0
REIT
REIT
I = 0
I = 1
I = 1
I = 0
I = 1
Nesting
IPL : Processor interrupt priority level
Interrupt 3
Interrupt 2
REIT
IPL = 5
IPL = 3
I : Interrupt enable flag
REIT
I = 0
I = 1
Main routine instructions
are not executed.
: Automatically executed.
: Set in software.
Not acknowledged because
of low interrupt priority
Multiple interrupts
5.6 Multiple interrupts