W83977EF-AW datasheet(81/142 Pages) WINBOND

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W83977EF-AW Datasheet(PDF) 81 Page - Winbond

81 / 142 page

W83977EF-AW/W83977EG-AW

Publication Release Date: Apr. 2006

-79-

Revision 1.2

9.2.3

Power LED

The Power LED function provides 1~1/8 Hertz rate toggle pulse output with 50 percent duty cycle.

Table 7.2.2 shows how to enable Power LED.

Table 9.2.2

WDT_CTRL1 BIT[1]

WDT_CTRL0 BIT[3]

WDT_CTRL1 BIT[0]

POWER LED STATE

Toggle pulse

Continuous high or low *

Toggle pulse

* Note: Continuous high or low depends on the polarity bit of GP13 or GP17 configuration registers.

9.2.4

General Purpose Address Decoder

General Purpose Address Decoder provides two address decode as AEN equal to logic 0. The

address base is stored at CR62, CR63, CR64, and CR65 of logical device 7 for GP14 and GP15. The

decoding range can be programmed to 1~8 byte boundary. The decoding output is normally active low.

Users can alter its polarity through the polarity bit of the GP14 and GP15 configuration register.

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