adp5589acbz-02-r7 datasheet(15/52 Pages) AD

Part #	ADP5589ACBZ-02-R7

Description	Keypad Decoder and I/O Expansion

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Manufacturer	AD [Analog Devices]

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Data Sheet

ADP5589

Rev. B | Page 15 of 52

GPI Input

Each of the 19 I/O lines can be configured as a general-purpose

logic input line. Figure 17 shows a detailed representation of the

GPI scan and detect block and all its associated control and

status signals.

PIN_CONFIG_A[7:0]

PIN_CONFIG_B[7:0]

PIN_CONFIG_C[2:0]

UNLOCK1[7:0]

UNLOCK2[7:0]

EXT_LOCK_EVENT[7:0]

UNLOCK_TIMER[2:0]

INT_MASK_TIMER[4:0]

LOCK_EN

GPI_INT

GPI SCAN

CONTROL

GPIO 1

GPIO 2

GPIO 3

GPIO 4

GPIO 5

GPIO 6

GPIO 7

GPIO 8

GPIO 9

GPIO 10

GPIO 11

GPIO 12

GPIO 13

GPIO 14

GPIO 15

GPIO 16

GPIO 17

GPIO 18

GPIO 19

(R0)

(R1)

(R2)

(R3)

(R4)

(R5)

(R6)

(R7)

(C0)

(C1)

(C2)

(C3)

(C4)

(C5)

(C6)

(C7)

(C8)

(C9)

(C10)

GPI EVENT

I2C BUSY?

KEY EVENT

OVRFLOW_INT

LOGIC EVENT

GPI_INT_LEVEL_A[7:0]

GPI_INT_LEVEL_B[7:0]

GPI_INT_LEVEL_C[2:0]

GPI_INTERRUPT_EN_A[7:0]

GPIO_DIRECTION_A[7:0]

GPI_STATUS_A[7:0]

GPI_STATUS_B[7:0]

GPI_STATUS_C[2:0]

GPI_INT_STAT_A[7:0]

LCK_TRK_GPI

LOCK_STAT

LOCK_INT

GPI_EVENT_EN_A[7:0]

GPIO_DIRECTION_B[7:0]

GPIO_DIRECTION_C[2:0]

GPI_INTERRUPT_EN_B[7:0]

GPI_INTERRUPT_EN_C[2:0]

GPI_EVENT_EN_B[7:0]

GPI_EVENT_EN_C[2:0]

EVENT_INT

GPI_INT_STAT_B[7:0]

GPI_INT_STAT_C[2:0]

RESET_TRIGGER_TIME[2:0]

RESET1_EVENT_A[7:0]

RESET1_EVENT_B[7:0]

RESET1_EVENT_C[7:0]

RESET2_EVENT_A[7:0]

RESET2_EVENT_B[7:0]

FIFO

UPDATE

FIFO

EC[4:0]

Figure 17. GPI Scan and Detect Block

The current input state of each GPI can be read back using the

GPI_STATUS_x registers. Each GPI can be programmed to

generate an interrupt via the GPI_INTERRUPT_EN_x registers.

The interrupt status is stored in the GPI_INT_STAT_x registers.

GPI interrupts can be programmed to trigger on inputs being

high or on inputs being low via the GPI_INT_LEVEL_x

registers. If any of the GPI interrupts is triggered, the master

GPI_INT interrupt is also triggered.

Figure 18 demonstrates a single GPI and how it affects its

corresponding status and interrupt status bits.

CLEARED

BY READ

GPI 6

GPI_STATUS_A[5]

GPI_INTERRUPT_EN_A[5]

GPI_INT_STAT_A[5]

GPI_INT

GPI_INT_LEVEL_A[5]

CLEARED

BY WRITE ‘1’

Figure 18. Single GPI Example

GPIs can be programmed to generate FIFO events via the

GPI_EVENT_EN_x registers. GPIs in this mode do not gener-

ate GPI_INT interrupts and instead generate EVENT_INT

interrupts. Figure 19 shows several GPI lines and their effects

on the FIFO and event count, EC[4:0].

GPI 2

GPI SCAN

EVENT_INT

EC[4:0]

16

GPI 2 ACTIVE

GPI 14

GPI 6

23

4

5

GPI 6 ACTIVE

GPI 14 ACTIVE

GPI 14 INACTIVE

GPI 6 ACTIVE

GPI 2 ACTIVE

FIFO

1

0

101

105

113

Figure 19. Multiple GPI Lines Example

The GPI scanner is idle until it detects a level transition. It scans

the GPI inputs and updates accordingly. It then returns to idle

immediately; it does not scan/wait, like the key scanner. As

such, the GPI scanner can detect narrow pulses once they get

past the 50 μs input debounce filter.

GPIs (programmed for FIFO updating) can be used as keypad

unlock events via the UNLOCKx registers (see the FIFO

Lock/Unlock section). The LCK_TRK_GPI bit can be used to

allow GPIs (programmed for FIFO updating) to be tracked

when the keypad is locked.

GPO OUTPUT

Each of the 19 I/O lines can be configured as a general-purpose

output (GPO) line. Figure 6 shows a detailed diagram of the I/O

structure. See the Detailed Register Descriptions section for

GPO configuration and usage.

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