PC87413 datasheet(191/257 Pages) NSC

191 / 257 page

9.0 System Wake-Up Control (SWC) (Continued)

Revision 1.2

191

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9.3.13

LED Blink Control Register (LEDBLNK)

This register controls the blinking rate of the two LEDs driven by the PC8741x device. It is reset by hardware to 70h.

Power Well:VPP

Location: All Banks, Offset 0Bh

Type:

R/W

9.3.14

BIOS General-Purpose Scratch Register (BIOSGPR)

This register may be used by the BIOS for general-purpose battery-backed data storage. It is reset by hardware to 00h.

Power Well:VPP

Location: All Banks, Offset 0Eh

Type:

R/W

Bit

43210

Name

Reserved

LED2BLNK

Reserved

LED1BLNK

Reset

10000

Bit

Description

Reserved.

6-4

LED2BLNK (LED2 Blink Rate). These bits control the blinking rate of LED2 output.

Bits

6 5 4

Rate (Hz)

Duty Cycle

0 0 0:

Off

Always inactive

0 0 1:

0.25

12.5%

0 1 0:

0.5

25%

0 1 1:

50%

1 0 0:

50%

1 0 1:

50%

1 1 0:

50%

1 1 1:

Always active (default)

Reserved.

2-0

LED1BLNK (LED1 Blink Rate). These bits control the blinking rate of LED1 output.

Bits

2 1 0

Rate (Hz)

Duty Cycle

0 0 0:

Off

Always inactive (default)

0 0 1:

0.25

12.5%

0 1 0:

0.5

25%

0 1 1:

50%

1 0 0:

50%

1 0 1:

50%

1 1 0:

50%

1 1 1:

Always active

Bit

43210

Name

General-Purpose Scratch

Reset

00000

Bit

Description

7-0

General-Purpose Scratch

PC87413 Datasheet(PDF) 191 Page - National Semiconductor (TI)

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