MEC1322 datasheet(52/456 Pages) MICROCHIP

52 / 456 page

MEC1322

DS00001719D-page 52

 2014 - 2015 Microchip Technology Inc.

3.6

Resets

48 MHz Ring Oscilla-

tor

OFF

This clock is powered by

the MEC1322 suspend

supply (VCC1) but may

start and stop as

described in Section 3.7,

"Chip Power Manage-

ment Features," on

page 54 (see also

Note 3-3).

TABLE 3-7:

DEFINITION OF RESET SIGNALS

Reset

Description

Source

VBAT_POR

Internal VBAT Reset signal. This signal is used

to reset VBAT powered registers.

VBAT_POR is a pulse that is asserted at the ris-

ing edge of VCC1GD if the VBAT voltage is

below a nominal 1.25V. VBAT_POR is also

asserted as a level if, while VCC1GD is not

asserted (‘0’), the coin cell is replaced with a

new cell that delivers at least a nominal 1.25V. In

this latter case VBAT_POR is de-asserted when

VCC1GD is asserted. No action is taken if the

coin cell is replaced, or if the VBAT voltage falls

below 1.25 V nominal, while VCC1GD is

asserted.

VCC1_RESET Internal VCC1 Reset signal. This signal is used

to reset VCC1 powered registers.

VCC1_RESET is asserted when VCC1GD is low

and is deasserted when VCC1GD is high. The

VCC1_RST# pin asserted as input will also

cause a VCC1_RESET. A WDT_RESET event

will also cause a VCC1_RESET assertion.

PCI RESET#

System reset signal connected to the LPC

LRESET# pin.

Pin Interface, LRESET# pin. See Note 3-8.

nSIO_RESET

Performs a reset when VCC is turned off or

when the system host resets the LPC Interface.

nSIO_RESET is a signal that is asserted if

VCC1GD is low, PWRGD is low, or PCI RESET#

is asserted low and may be deasserted when

these three signals are all high. The iRE-

SET_OUT bit controls the deassertion of

nSIO_RESET. See Note 3-8.

A WDT_RESET event will also cause an

nSIO_RESET assertion.

TABLE 3-6:

TYPICAL MEC1322 CLOCKS VS. ACPI POWER STATES (CONTINUED)

Clock

Name

ACPI Power State

Description

(FULL

ON)

(POS)

(STR)

(STD)

(Soft

Off)

(MECH

Off)

MEC1322 датащи(PDF) 52 Page - Microchip Technology

MEC1322 датащи(HTML) 52 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL