R8CSLASH2G datasheet(111/344 Pages) RENESAS

部件名	R8C/2G

功能描述	RENESAS MCU R8C FAMILY / R8C/2x SERIES

PDF	344 Pages

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制造商	RENESAS [Renesas Technology Corp]

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R8C/2G Group

11. Clock Generation Circuit

Rev.1.00

Apr 04, 2008

Page 91 of 318

REJ09B0387-0100

Figure 11.4

OCD Register

System Clock Select Register(1)

Symbol

Address

After Reset

OCD

000Ch

00000100b

Bit Symbol

Bit Name

Function

NOTES:

b7 b6 b5 b4 b3 b2 b1 b0

000

—

(b1-b0)

—

Nothing is assigned. If necessary, set to 0.

When read, the content is 0.

Nothing is assigned. If necessary, set to 0.

When read, the content is 0.

—

OCD2

System clock select bit

0 : Selects XCIN clock

1 : Selects on-chip oscillator clock(2)

Nothing is assigned. If necessary, set to 0.

When read, the content is 0.

—

(b3)

—

The CM14 in the CM1 register bit is set to 0 (low -speed on-chip oscillator on) if the OCD2 bit is set to 1 (on-chip

oscillator clock selected).

Set the PRC0 bit in the PRCR register to 1 (w rite enable) before rew riting to the OCD register.

—

(b6-b4)

Reserved bits

Set to 0.

—

(b7)

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