R8CL3AB datasheet(33/89 Pages) RENESAS

Part #	R8CL3AB

Description	Household appliances, office equipment, audio equipment, consumer products, etc.

PDF	89 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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2. Central Processing Unit (CPU)

REJ03B0243-0030 Rev.0.30

Jan 21, 2009

Page 31 of 76

R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group,

R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group

Under development Preliminary specification

Specifications in this manual are tentative and subject to change.

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.

R8CL3AB Datasheet(PDF) 33 Page - Renesas Technology Corp