R5F2135CMDFP datasheet(13/57 Pages) RENESAS

Part #	R5F2135CMDFP

Description	household appliances, office equipment, audio equipment, consumer equipment

PDF	57 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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13 / 57 page

R8C/35M Group

2. Central Processing Unit (CPU)

Under development Preliminary document

Specifications in this document are tentative and subject to change.

R01DS0021EJ0020 Rev.0.20

Page 13 of 54

Feb 15, 2011

2.8.7

Interrupt Enable Flag (I)

The I flag enables maskable interrupts.

Interrupts 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.

2.8.8

Stack Pointer Select Flag (U)

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.

2.8.9

Processor Interrupt Priority Level (IPL)

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.

2.8.10

Reserved Bit

If necessary, set to 0. When read, the content is undefined.

R5F2135CMDFP Datasheet(PDF) 13 Page - Renesas Technology Corp