WM9712CLGEFLSLASHV datasheet(50/78 Pages) WOLFSON

tên linh kiện	WM9712CLGEFL/V

Giải thích chi tiết về linh kiện	AC??7 Audio and Touchpanel CODEC

PDF	78 Pages

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nhà sản xuất	WOLFSON [Wolfson Microelectronics plc]

Trang chủ	http://www.wolfsonmicro.com

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WM9712L

Production Data

PD, Rev 4.6, November 2011

COMP2 DELAY FUNCTION

COMP2 has an optional delay function for use when the input signal is noisy. When COMP2 triggers

and the delay is enabled (i.e. COMP2DEL is non-zero), then GPIO bit 14 does not change state

immediately, and no interrupt is generated. Instead, the WM9712L starts a delay timer and checks

COMP2 again after the delay time has passed. If COMP2 is still active, then the GPIO bit is set and

an interrupt may be generated (depending on the state of the GW14 bit). If COMP2 is no longer

active, the GPIO bit is not set, i.e. all register bits are as if COMP2 had never triggered.

Note: If COMP2 triggers while the WM9712L is in sleep mode, and the delay is enabled, then the

device starts the on-chip crystal oscillator in order to count the time delay.

COMP2

TRIGGERS

START TIMER

COMP2?

WAIT

time=COMP2DEL

SHUT DOWN

TIMER

Inactive

Active

SET GI14

END

[FALSE ALARM]

COMP2

DEL?

non-zero

C2W?

END

000

Figure 14 COMP2 Delay Flow Chart

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