ATAM893X-TKHYZ ATMEL [ATMEL Corporation], ATAM893X-TKHYZ Datasheet - Page 19
ATAM893X-TKHYZ
Manufacturer Part Number
ATAM893X-TKHYZ
Description
Flash Version for ATAR080, ATAR090/890 and ATAR092/892
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATAM893X-TKHYZ.pdf
(98 pages)
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4.5.2.5
4.5.3
4680C–4BMCU–01/05
Clock Management
32-kHz Oscillator
Figure 4-17. Ceramic Resonator
Note:
Some applications require long-term time keeping or low resolution timing. In this case, an on-
chip, low power 32-kHz crystal oscillator can be used to generate both the SUBCL and the
SYSCL. In this mode, power consumption is greatly reduced. The 32-kHz crystal oscillator can
not be stopped while the power-down mode is in operation.
Figure 4-18. 32-kHz Crystal Oscillator
Note:
The clock management register controls the system clock divider and synchronization stage.
Writing to this register triggers the synchronization cycle.
Both, the 4-MHz and the 32-kHz crystal oscillator, use an integrated 14 stage divider circuit to sta-
bilize oscillation before the oscillator output is used as system clock. This results in an additional
delay of about 4 ms for the 4-MHz crystal and about 500 ms for the 32-kHz crystal.
Both, the 4-MHz and the 32-kHz crystal oscillator, use an integrated 14 stage divider circuit to sta-
bilize oscillation before the oscillator output is used as system clock. This results in an additional
delay of about 4 ms for the 4-MHz crystal and about 500 ms for the 32-kHz crystal.
C
flash option
4
C
flash option
3
*
32 kHz
XTAL
OSC1
OSC2
*
OSC1
OSC2
Cer.
Res
*
C
*
C
1
2
C
*
*
C
Oscin
Oscout
1
2
oscillator
32-kHz
Oscout
Oscin
oscillator
4-MHz
32Out
4Out
Stop
Osc-Stop
32Out
4Out
ATAM893-D
19
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