HD64F2149YV datasheet(549/1075 Pages) RENESAS

549 / 1075 page

Section 16 I

2C Bus Interface

Rev. 3.00 Jan 18, 2006 page 521 of 1044

REJ09B0280-0300

Bit 6—DDC Mode Switch (SW): Selects either formatless mode or the I

2C bus format for IIC

channel 0.

Bit 6

Description

IIC channel 0 is used with the I

2C bus format

(Initial value)

[Clearing conditions]

1. When 0 is written by software

2. When a falling edge is detected on the SCL pin when SWE = 1

IIC channel 0 is used in formatless mode

[Setting condition]

When 1 is written in SW after reading SW = 0

Bit 5—DDC Mode Switch Interrupt Enable Bit (IE): Enables or disables an interrupt request to

the CPU when automatic format switching is executed for IIC channel 0.

Bit 5

Description

Interrupt when automatic format switching is executed is disabled

(Initial value)

Interrupt when automatic format switching is executed is enabled

Bit 4—DDC Mode Switch Interrupt Flag (IF): Flag that indicates an interrupt request to the

CPU when automatic format switching is executed for IIC channel 0.

Bit 4

Description

No interrupt is requested when automatic format switching is executed

(Initial value)

[Clearing condition]

When 0 is written in IF after reading IF = 1

An interrupt is requested when automatic format switching is executed

[Setting condition]

When a falling edge is detected on the SCL pin when SWE = 1

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