R5F212B7SDFA RENESAS [Renesas Technology Corp], R5F212B7SDFA Datasheet - Page 21

• Manufacturer Part Number: R5F212B7SDFA
• Description: RENESAS MCU
• Manufacturer: RENESAS [Renesas Technology Corp]

R8C/2A Group, R8C/2B Group
Rev.2.10
REJ03B0182-0210
2.8.7
2.8.8
2.8.9
2.8.10
The I flag enables maskable interrupts.
Interrupt are disabled when the I flag is set to 0, and are enabled when the I flag is set to 1. The I flag is set to 0
when an interrupt request is acknowledged.
ISP is selected when the U flag is set to 0; USP is selected when the U flag is set to 1.
The U flag is set to 0 when a hardware interrupt request is acknowledged or the INT instruction of software
interrupt numbers 0 to 31 is executed.
IPL is 3 bits wide and assigns processor interrupt priority levels from level 0 to level 7.
If a requested interrupt has higher priority than IPL, the interrupt is enabled.
If necessary, set to 0. When read, the content is undefined.
Nov 26, 2007
Interrupt Enable Flag (I)
Stack Pointer Select Flag (U)
Processor Interrupt Priority Level (IPL)
Reserved Bit
Page 19 of 60
2. Central Processing Unit (CPU)