w83977eg Winbond Electronics Corp America, w83977eg Datasheet - Page 81

• Manufacturer Part Number: w83977eg
• Description: Winbond Isa I/o W83977ef W83977eg
• Manufacturer: Winbond Electronics Corp America

9.2.3
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
* Note: Continuous high or low depends on the polarity bit of GP13 or GP17 configuration registers.
9.2.4
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.
WDT_CTRL1 BIT[1]
Power LED
General Purpose Address Decoder
1
0
0
0
WDT_CTRL0 BIT[3]
X
0
1
1
W83977EF-AW/W83977EG-AW
-79-
WDT_CTRL1 BIT[0]
X
X
0
1
Publication Release Date: Apr. 2006
Toggle pulse
Continuous high or low *
Continuous high or low *
Toggle pulse
POWER LED STATE
Revision 1.2