Rainbow Electronics W90P710CDG User Manual
Page 508
W90P710CD/W90P710CDG
Publication Release Date: September 19, 2006
- 509 -
Revision B2
Key Pad Interface Status Register (KPISTATUS)
REGISTER
ADDRESS
R/W DESCRIPTION RESET
VALUE
KPISTATUS 0xFFF8_800C R/O
key
pad status register
0x0000_0000
31
30
29
28
27
26
25
24
RESERVED
23
22
21
20
19
18
17
16
RESERVED INT
3 K R S T P D W A K E
3KEY 2KEY 1KEY
15
14
13
12
11
10
9
8
RESERVED KEY1R
KEY1C
7
6
5
4
3
2
1
0
RESERVED KEY0R
KEY0C
BITS
DESCRIPTION
[31:22] RESERVED
-
[21] INT
Key interrupt
This bit indicates the key scan interrupt is active and that one or two
keys have changed status. The interrupt also occur when the three
specified keys are detected if ENRST bit in KPI3KFCON is cleared.
It will be cleared by hardware automatically when software read
KPISTATUS register.
[20]
3KRST
3-Keys reset flag
This bit is a record flag for software reference, it will be set after 3-
keys reset occur.
1 = 3 keys reset
0 = not reset.
This bit is cleared while it is read.
[19]
PDWAKE
Power Down Wakeup flag
This flag indicates the chip is wakeup from power down by keypad
1 =wakeup up by keypad
0 = not wakeup
[18] 3KEY
Specified three-key is detected.
This flag indicates specified-three-keys was detected. Software can
read this bit to know the keypad interrupt is 3 key or not.