Rainbow-electronics W90P710CDG Manual de usuario descargar pdf (Pagina 507)

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W90P710CD/W90P710CDG

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KeyPad Interface Low Power Mode Configuration Register (KPILPCONF)

KPILPCOF 0xFFF8_8008 W/R Low power configuration register 0x0000_0000

31 30 29 28 27 26 25 24

RESERVED

23 22 21 20 19 18 17 16

WAKE

15 14 13 12 11 10 9 8

LPWCEN

7 6 5 4 3 2 1 0

RESERVED LPWR

BITS DESCRIPTION

[31:17] RESERVED

[16] WAKE

Lower power wakeup enable

Setting this bit enables low power wakeup

1 = wakeup enable

0 = not enable

[15:8] LPWCEN

Low power wakeup column enable

Specify columns for low power wakeup. For example, if user wants to

use keys in row N and column 0, 2, 5 to wake up W90P710, then the

LPWCEN should be fill 8’b00100101.

Application restriction: when ENCODE=1 case, LPWCEN should be

set as 0xFF ie, all columns in specified row are used as wake up input.

In this case, user can not specify special cloumn(s) to wake up

W90P710.

[7:4] RESERVED -

[3:0] LPWR

Low power wakeup row address

Define the row address keys used to wakeup. For 16x8 or 8x8 (with

4:16 or 3:8 decoder) keypad key configuration, LPWR means “Hex”

code but for 4x8 (without decoder), LPWR means “binary” code. For

example, if user wants to use all keys on row 3 of 16x8 keypad to

wakeup W90P710, then 0x3 should be fill into this register but for 4x8

keypad it should be filled as 4’b1000.

1 2 ... 502 503 504 505 506 507 508 509 510 511 512 ... 551 552

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Rainbow-electronics W90P710CDG Manual de usuario Pagina 507

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