Atmel Evaluation Kit for AT32uC3A0512, 32-Bit AVR Microcontroller Atmel ATEVK1105 ATEVK1105 数据表
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产品代码
ATEVK1105
74
AT32UC3A
13.6.5
PM Oscillator 0/1 Control
Register name
OSCCTRL0,1
Register access
Read/Write
•
MODE: Oscillator Mode
Choose between crystal, or external clock
0: External clock connected on XIN, XOUT can be used as an I/O (no crystal)
1 to 3: reserved
4: Crystal is connected to XIN/XOUT - Oscillator is used with gain G0 ( XIN from
1 to 3: reserved
4: Crystal is connected to XIN/XOUT - Oscillator is used with gain G0 ( XIN from
0.4 MHz to 0.9 MHz ).
5: Crystal is connected to XIN/XOUT - Oscillator is used with gain G1 ( XIN from
0.9 MHz to 3.0 MHz ).
6: Crystal is connected to XIN/XOUT - Oscillator is used with gain G2 ( XIN from
3.0 MHz to 8.0 MHz ).
7: Crystal is connected to XIN/XOUT - Oscillator is used with gain G3 ( XIN from
8.0 Mhz).
•
STARTUP: Oscillator Startup Time
Select startup time for the oscillator.
31
30
29
28
27
26
25
24
-
-
-
-
-
-
-
-
23
22
21
20
19
18
17
16
-
-
-
-
-
-
-
-
15
14
13
12
11
10
9
8
-
-
-
-
-
STARTUP
7
6
5
4
3
2
1
0
-
-
-
-
-
MODE
Table 13-7.
Startup time for oscillators 0 and 1
STARTUP
Number of RC oscillator
clock cycle
clock cycle
Approximative Equivalent time
(RCOsc = 115 kHz)
(RCOsc = 115 kHz)
0
0
0
1
64
560 us
2
128
1.1 ms
3
2048
18 ms
4
4096
36 ms
5
8192
71 ms
6
16384
142 ms
7
Reserved
Reserved
32058K
AVR32-01/12