AT91SAM7S64C-AU View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT91SAM7S64C-AU

AT91SAM ARM-based Flash MCU

Atmel Corporation 

25.9.7 PMC Clock Generator Main Oscillator Register

Register Name:

CKGR_MOR

Access Type:

Read-write

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

–

–

–

–

–

–

–

–

15

14

13

12

11

10

9

8

OSCOUNT

7

6

5

4

3

2

1

0

–

–

–

–

–

–

OSCBYPASS MOSCEN

• MOSCEN: Main Oscillator Enable

A crystal must be connected between XIN and XOUT.

0 = The Main Oscillator is disabled.

1 = The Main Oscillator is enabled. OSCBYPASS must be set to 0.

When MOSCEN is set, the MOSCS flag is set once the Main Oscillator startup time is achieved.

• OSCBYPASS: Oscillator Bypass

0 = No effect.

1 = The Main Oscillator is bypassed. MOSCEN must be set to 0. An external clock must be connected on XIN.

When OSCBYPASS is set, the MOSCS flag in PMC_SR is automatically set.

Clearing MOSCEN and OSCBYPASS bits allows resetting the MOSCS flag.

• OSCOUNT: Main Oscillator Start-up Time

Specifies the number of Slow Clock cycles multiplied by 8 for the Main Oscillator start-up time.

SAM7S Series [DATASHEET]

6175M–ATARM–26-Oct-12

206

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