Rainbow Electronics W90N745CDG - Manual (Page 382)

W90N745CD/W90N745CDG
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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.