Data Sheet

ADP5587

Rev. E | Page 17 of 24

Table 18. INT_STAT—Register 0x02 (Interrupt Status Register)

Field

Bits

Description

Not Used

[7:4]

N/A

3

Overflow interrupt status. When set, write 1 to clear.

1: overflow interrupt is detected.

0: overflow interrupt is not detected.

2

Keylock interrupt status. When set, write 1 to clear.

1: keylock interrupt is detected.

0: keylock interrupt is not detected.

1

GPI interrupt status. When set, write 1 to clear.

1: GPI interrupt is detected.

0: GPI interrupt is not detected.

0

Key events interrupt status. When set, write 1 to clear.

1: key events interrupt is detected.

0: key events interrupt is not detected.

1

The KE_INT, GPI_INT, and OVR_FLOW_INT bits reflect the status of the interrupts when the interrupt types are enabled even if the processor interrupt is masked.

2

The K_LCK_INT bit is the interrupt to the processor when the keypad lock sequence is triggered.

3

If there is a pending key event or GPI interrupt in their respective registers, KE_INT is not cleared until the FIFO is empty, and GPI_INT is not cleared until the cause of

the interrupt is resolved. The host must write a 1 to the KE_INT and GPI_INT bits to clear them.

Table 19. KEY_LCK_EC_STAT—Register 0x03 (Keylock and Event Counter Register)

Field

Bits

Description

K_LCK_EN

[6]

0: lock feature is disabled.

1: lock feature is enabled.

LCK2, LCK1

[5:4]

Keypad lock status[1:0] (00 = unlocked; 11 = locked; read-only bits).

[3:0]

Key event count of key event register.

1

The KEC field indicates the key event count of key event registers that have values in the bit (KEC(0000) = 0 events, KEC(0001) = 1 event, KEC(1010) = 10 events). As the

key events are read and cleared, the state machine automatically reduces the event count in KEC.

Register Name

Register Description

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

KEY_EVENTA

(Register 0x04)

Key Event Register A status (KE[6:0] = key number),

KP[7] = 0: released, 1: pressed (cleared on read)

KA7

KA6

KA5

KA4

KA3

KA2

KA1

KA0

KEY_EVENTB

(Register 0x05)

Key Event Register B status (KE[6:0] = key number),

KP[7 ] = 0: released, 1: pressed (cleared on read)

KB7

KB6

KB5

KB4

KB3

KB2

KB1

KB0

KEY_EVENTC

(Register 0x06)

Key Event Register C status (KE[6:0] = key number),

KP[7] = 0: released, 1: pressed (cleared on read)

KC7

KC6

KC5

KC4

KC3

KC2

KC1

KC0

KEY_EVENTD

(Register 0x07)

Key Event Register D status (KE[6:0] = key number),

KP[7] = 0: released, 1: pressed (cleared on read)

KD7

KD6

KD5

KD4

KD3

KD2

KD1

KD0

(Register 0x08)

Key Event Register E status (KE[6:0] = key number),

KP[7] = 0: released, 1: pressed (cleared on read)

KE7

KE6

KE5

KE4

KE3

KE2

KE1

KE0

KEY_EVENTF

(Register 0x09)

Key Event Register F status (KE[6:0] = key number),

KP[7] = 0: released, 1: pressed (cleared on read)

KF7

KF6

KF5

KF4

KF3

KF2

KF1

KF0

KEY_EVENTG

(Register 0x0A)

Key Event Register G status (KE[6:0] = key number),

KP[7] = 0: released, 1: pressed (cleared on read)

KG7

KG6

KG5

KG4

KG3

KG2

KG1

KG0

KEY_EVENTH

(Register 0x0B)

Key Event Register H status (KE[6:0] = key number),

KP[7] = 0: released, 1: pressed (cleared on read)

KH7

KH6

KH5

KH4

KH3

KH2

KH1

KH0

KEY_EVENTI

(Register 0x0C)

Key Event Register I status (KE[6:0] = key number),

KP[7] = 0: released, 1: pressed (cleared on read)

KI7

KI6

KI5

KI4

KI3

KI2

KI1

KI0

KEY_EVENTJ

(Register 0x0D)

Key Event Register J status (KE[6:0] = key number),

KP[7] = 0: released, 1: pressed (cleared on read)

KJ7

KJ6

KJ5

KJ4

KJ3

KJ2

KJ1

KJ0

1

Data in key event registers is provided as a FIFO, where data is sequentially provided on each read, regardless of an event register read. The user can read the

KEY_EVENTA register only for an event count or can read registers sequentially.

2

KE[6:0] reflects the value 1 to 80 for key press events and the value 97 to 114 for GPI events. For KE[7:0], 0 = key released event, 1 = key pressed event. For GPIEM_CFG,

0 reflects a change in the GPI from GPI_INT_LVL = true to GPI_INT_LVL = false; 1 reflects a change in the GPI in which the GPI_INT_LVL condition becomes true.