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MEC1632 датащи(PDF) 102 Page - Microchip Technology

номер детали MEC1632
подробное описание детали  Low Power 32-Bit Mobile Embedded Controller
PDF  636 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MEC1632 датащи(HTML) 102 Page - Microchip Technology

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MEC1632
DS00001592B-page 102
 2012-2018 Microchip Technology Inc.
7.4.5
32.768 KHZ SILICON OSCILLATOR
7.4.5.1
Description
The 32.768 KHz Silicon Oscillator provides a clock source for the 32K Clock Domain that does not require an external
crystal (see also Section 7.4.6, "32 KHz Clock Domain Switching," on page 103).
The 32.768 KHz Silicon Oscillator is controlled by the 32K_EN bit in the Clock Enable Register (see Section 7.9.2,
"Clock Enable Register," on page 149). When 32K_EN is asserted, there is a start-up delay (tSTART) for the 32.768
KHz Silicon Oscillator as shown in Table 7-8.
The clocks sourced by the 32.768 KHz Silicon Oscillator in the 32K Clock Domain operate as described in Table 7-23,
"Typical MEC1632 Clocks vs. ACPI Power States" (see Section 7.5.1, "Power Supplies and Clocks ACPI Context," on
page 121.
FIGURE 7-5:
32.768 KHz Silicon Oscillator BLOCK DIAGRAM
FIGURE 7-6:
32.768 KHz Silicon Oscillator TIMING
TABLE 7-8:
32.768 KHz Silicon Oscillator TIMING PARAMETERS
Symbol
Parameter
Limits
Units
Comments
MIN
NOM
MAX
fOSC
Oscillator Output Frequency
32.113
32.768
33.423
KHz
tSTART
Oscillator Lock Time
–
–
300
s
fOUT
32K_EN
EN
OUT
tSTART
fOUT
fOSC
32K_EN



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