PC87413 datasheet(193/257 Pages) NSC

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

Revision 1.2

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9.3.16

Keyboard Wake-Up Control Register (KBDWKCTL)

This register configures the keyboard events detected by the Keyboard/Mouse Wake-up Detector. It is reset by hardware

to 00h.

Power Well:VPP

Location:Bank 0, Offset 12h

Type:

R/W

Bit

43210

Name

KBDMODE

Reserved

EVT3CFG

EVT2CFG

EVT1CFG

Reset

00000

Bit

Description

KBDMODE (Keyboard Mode Select). This bit selects one of the keyboard wake-up modes for the

Keyboard/Mouse Wake-up Detector.

0: Special Key Sequence or Password modes - configured by bits 3-0 of the PS2CTL register (default)

1: Power Management Key mode - configured by bits 5-0 of the KBDWKCTL register

Reserved.

5-4

EVT3CFG (Keyboard Event 3 Configuration). These bits conﬁgure the keyboard data sequence for Keyboard

Event 3, which indicates that “PM Key 3” was pressed on the keyboard. The setting of the EVT3CFG ﬁeld is

relevant only if the Keyboard/Mouse Wake-up Detector is in Power Management Key mode (KBDMODE = 1).

The keyboard data sequence used to detect Keyboard Event 3 is stored in registers PS2KEY6 and PS2KEY7,

starting with PS2KEY6.

Bits

5 4

Sequence Length

0 0:

0 bytes - Keyboard Event 3 disabled (default)

0 1:

1 byte (PS2KEY6)

1 0:

2 bytes (PS2KEY6, PS2KEY7)

1 1:

Reserved

3-2

EVT2CFG (Keyboard Event 2 Configuration). These bits conﬁgure the keyboard data sequence for Keyboard

Event 2, which indicates that “PM Key 2” was pressed on the keyboard. The setting of the EVT2CFG ﬁeld is

relevant only if the Keyboard/Mouse Wake-up Detector is in Power Management Key mode (KBDMODE = 1).

The keyboard data sequence used to detect Keyboard Event 2 is stored in registers PS2KEY3 to PS2KEY5,

starting with PS2KEY3.

Bits

3 2

Sequence Length

0 0:

0 bytes - Keyboard Event 2 disabled (default)

0 1:

1 byte (PS2KEY3)

1 0:

2 bytes (PS2KEY3, PS2KEY4)

1 1:

3 bytes (PS2KEY3, PS2KEY4, PS2KEY5)

1-0

EVT1CFG (Keyboard Event 1 Configuration). These bits conﬁgure the keyboard data sequence for Keyboard

Event 1, which indicates that “PM Key 1” was pressed on the keyboard. The setting of the EVT1CFG ﬁeld is

relevant only if the Keyboard/Mouse Wake-up Detector is in Power Management Key mode (KBDMODE = 1).

The keyboard data sequence used to detect Keyboard Event 1 is stored in registers PS2KEY0 to PS2KEY2,

starting with PS2KEY0.

Bits

1 0

Sequence Length

0 0:

0 bytes - Keyboard Event 1 disabled (default)

0 1:

1 byte (PS2KEY0)

1 0:

2 bytes (PS2KEY0, PS2KEY1)

1 1:

3 bytes (PS2KEY0, PS2KEY1, PS2KEY2)

PC87413 Datasheet(PDF) 193 Page - National Semiconductor (TI)

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