at91cap7e ATMEL Corporation, at91cap7e Datasheet - Page 30
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at91cap7e
Manufacturer Part Number
at91cap7e
Description
Customizable Microcontroller
Manufacturer
ATMEL Corporation
Datasheet
1.AT91CAP7E.pdf
(520 pages)
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9.16
9.16.1
Table 9-1.
9.16.2
Register Name:
Access Type:
Reset Value:
• OSC32K_RC_EN: Enable internal RC oscillator
0: No effect.
1: Enables the internal RC oscillator [enabled out of reset indicating system starts off of RC]
• OSC32K_XT_EN: Enable external crystal oscillator
0: No effect.
1: Enables the external crystal oscillator
• OSC32K_SEL: Slow clock source select
0: Selects internal RC as source of slow clock
1: Selects external crystal and source of slow
NOTE: After setting OSC32K_XT_EN bit, wait till 1.2s of on chip slow clock timing before setting OSC32K_SEL bit.
30
Offset
0xAC
0x50
0x60
31
23
15
–
–
–
7
–
---
User Interface
AT91CAP7E
Special System Controller Register Mapping
Oscillator Mode Register
Special System Controller Registers
Register
General Purpose Backup Register 1
---
General Purpose Backup Register 20
Oscillator Mode Register
30
22
14
0x00000001
–
–
–
6
–
29
21
13
–
–
–
5
–
SYSC_OSCMR
Read/Write
28
20
12
–
–
–
4
–
OSC32K_SEL
SYSC_GPBR20
SYSC_OSCMR
SYSC_GPBR1
Name
27
19
11
–
–
–
3
---
26
18
10
–
–
–
2
–
Read/Write
Read/Write
Read/Write
Access
---
OSC32K_XT
_ EN
25
17
–
–
9
–
1
Reset Value
OSC32K_RC
8549A–CAP–10/08
0x1
0x0
0x0
---
_ EN
24
16
–
–
8
–
0
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