Rainbow Electronics W90N745CDG User Manual
Page 381
W90N745CD/W90N745CDG
Publication Release Date: September 22, 2006
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377
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Revision
A2
KeyPad Interface Low Power Mode Configuration Register (KPILPCONF)
REGISTER ADDRESS
R/W
DESCRIPTION
RESET
VALUE
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
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[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 W90N745, then the
LPWCEN should be fill 8’b00100101.
[7:4] RESERVED
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[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 W90N745, then 0x3 should be fill into this register but for 4x8
keypad it should be filled as 4’b1000.