R5F2L3ACBNFP datasheet(185/848 Pages) RENESAS

185 / 848 page

REJ09B0441-0010 Rev.0.10

Jul 30, 2008

Page 149 of 809

Under development Preliminary specification

Specifications in this manual are tentative and subject to change.

10. Power Control

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

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

10.2.4

Oscillation Stop Detection Register (OCD)

Notes:

1. Set bits OCD1 to OCD0 to 00b before the MCU enters stop mode, high-speed on-chip oscillator mode, or low-

speed on-chip oscillator mode (XIN clock stops).

2. When the OCD2 bit is set to 1 (on-chip oscillator clock selected), the CM14 bit is set to 0 (low-speed on-chip

oscillator on).

3. The OCD2 bit is automatically set to 1 (on-chip oscillator clock selected) when the XIN clock oscillation stop is

detected while bits OCD1 to OCD0 are set to 11b. When the OCD3 bit is set to 1 (XIN clock stops), the OCD2 bit

remains unchanged even if 0 (XIN clock selected) is written to it.

4. The OCD3 bit is enabled when the OCD0 bit is set to 1 (oscillation stop detection function enabled).

5. The OCD3 bit remains 0 (XIN clock oscillates) when bits OCD1 to OCD0 are set to 00b.

6. Refer to 9.7.1 How to Use Oscillation Stop Detection Function for the switching procedure when the XIN

clock re-oscillates after detecting an oscillation stop.

Set the PRC0 bit in the PRCR register to 1 (write enabled) before rewriting the OCD register.

Address 000Ch

Bit

b7b6b5

b4b3b2

b1b0

Symbol

—

OCD3

OCD2

OCD1

OCD0

After Reset

000

001

Bit

Symbol

Bit Name

Function

R/W

OCD0

Oscillation stop detection enable bit (6) 0: Oscillation stop detection function disabled (1)

1: Oscillation stop detection function enabled

R/W

OCD1

Oscillation stop detection interrupt

enable bit

0: Disabled (1)

1: Enabled

R/W

OCD2

System clock select bit (3)

0: XIN clock selected (6)

1: On-chip oscillator clock selected (2)

R/W

OCD3

Clock monitor bit (4, 5)

0: XIN clock oscillates

1: XIN clock stops

—

Reserved bits

Set to 0.

R/W

—

R5F2L3ACBNFP Datasheet(PDF) 185 Page - Renesas Technology Corp

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