ISO1228DFBR datasheet(4/44 Pages) TI1

4 / 44 page

Table 4-1. Pin Functions—38 Pins (continued)

I/O

DESCRIPTION

NO.

NAME

AVCC

—

Field Side Power Supply

AVSS

—

Field Side Negative Supply

IN8

I/O

Field Input, Channel 8

LED8

I/O

LED Indication Pin, Channel 8

—

Leave unconnected

GND1

—

Logic Ground

—

Leave unconnected

Digital Filter Setting

GND1

—

Logic Ground

nFAULT

Open Drain Ouput. Connect 4.7 kΩ pull-up to VCC1

OUT_EN

Ouput Enable. Output pins OUT1 through OUT8 are tri-stated if OUT_EN=0 or FLOAT

OUT8/SYNC

Synchronize data in Burst Mode(COMM_SEL=VCC1)

Data Output, Channel 8, in Parallel Interface Mode (COMM_SEL=0)

OUT7/

BURST_EN

I/O

Burst Mode in Serial Interface Mode (COMM_SEL=VCC1)

Data Output, Channel 7, in Parallel Interface Mode (COMM_SEL=0)

OUT6/nRST

I/O

Active Low SPI Reset in Serial Interface Mode (COMM_SEL=VCC1)

Data Output, Channel 6, in Parallel Interface Mode (COMM_SEL=0)

OUT5/nINT

Active Low SPI Interrupt in Serial Interface Mode (COMM_SEL=VCC1)

Data Output, Channel 5, in Parallel Interface Mode (COMM_SEL=0)

OUT4/nCS

I/O

SPI Chip Seltect in Serial Interface Mode (COMM_SEL=VCC1)

Data Output, Channel 4, in Parallel Interface Mode (COMM_SEL=0)

OUT3/SCLK

I/O

SPI Clock in Serial Interface Mode (COMM_SEL=VCC1)

Data Output, Channel 3, in Parallel Interface Mode (COMM_SEL=0)

OUT2/SDI

I/O

SPI Input Data in Serial Interface Mode (COMM_SEL=VCC1)

Data Output, Channel 2, in Parallel Interface Mode (COMM_SEL=0)

OUT1/SDO

SPI Output Data in Serial Interface Mode (COMM_SEL=VCC1)

Data Output, Channel 1, in Parallel Interface Mode (COMM_SEL=0)

GND1

—

Logic Ground

VCC1

—

Logic Supply

COMM_SEL

Serial vs. Parallel Interface selection

Serial Interface Mode if COMM_SEL=VCC1

Parallel Interface Mode if COMM_SEL=0 or Floating

• I = Input, O = Output, I/O = Input/Output

• Connect all AVSS pins on Field side together

• Connect all GND1 pins on backplane/MCU side together

ISO1228

SLLSFN5A – JUNE 2023 – REVISED FEBRUARY 2024

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