SLLU375 September   2024 ISO1228

 

  1.   1
  2.   Description
  3.   Features
  4.   4
  5. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  6. 2Hardware
    1. 2.1 Pin Configuration of the ISO1228
    2. 2.2 EVM Board Block Diagram and Image
    3. 2.3 EVM Setup and Operation
      1. 2.3.1 EVM Jumper Settings
  7. 3Hardware Design Files
    1. 3.1 Schematics
    2. 3.2 PCB Layouts
    3. 3.3 Bill of Materials
  8. 4Additional Information
    1. 4.1 Trademarks

2.3.1 EVM Jumper Settings

The ISO1228EVM has several configurable jumpers that can be used to modify the behavior of the ISO1228. All jumpers are left open by default, which program the ISO1228 EVM to operate in the parallel interface mode with enabled outputs and digital filtering of 1ms on the channels. Alternative jumper configurations and the resulting device behaviors are explained below.

The COMM_SEL pin of the ISO1228 controls the output options and is configurable with jumper J4. The available configurations of the COMM_SEL pin is described in Table 2-2.

Table 2-2 Comm_Sel Pin Jumper Descriptions
JumperConfigurationDescription
J4All pins open (default)Parallel interface mode enabled (default)
Pin 1-Pin 2 shorted
(COMM_SEL tied to Ground)		Parallel interface mode enabled
Pin 2-Pin 3 shorted
(COMM_SEL tied to VCC1)		Serial interface mode enabled

The F0 and F1 pins of the ISO1228 control the digital filter settings. Since each pin has three potential states, there are 9 distinct combinations and digital low pass filters. Pin F0 can be configured with jumper J9 and pin F1 can be configured with jumper J10. All potential combinations of pin F0 and F1 is shown in Table 2-3. The digital filters can also be programmed through the SPI registers. If any SPI filter Enable register bit is flipped, the states of the F0 and F1 pins are ignored.

Table 2-3 F0 and F1 Pin Jumper Descriptions
OptionJumperConfigurationDescription
1J9All pins open
(default)		1ms filter averaging time (default)
J10All pins open
(default)
2J9Pin 1-Pin 2 shorted
(F0 tied to ground)		0ns filter averaging time
J10Pin 1-Pin 2 shorted
(F1 tied to ground)
3J9All pins open
(default)		1μs filter averaging time
J10Pin 1-Pin 2 shorted
(F1 tied to ground)
4J9Pin 2-Pin 3 shorted
(F0 tied to VCC1)		10μs filter averaging time
J10Pin 1-Pin 2 shorted
(F1 tied to ground)
5J9Pin 1-Pin 2 shorted
(F0 tied to ground)		200μs filter averaging time
J10All pins open
(default)
6J9Pin 2-Pin 3 shorted
(F0 tied to VCC1)		3ms filter averaging time
J10All pins open
(default)
7J9Pin 1-Pin 2 shorted
(F0 tied to ground)		10ms filter averaging time
J10Pin 2-Pin 3 shorted
(F1 tied to VCC1)
8J9All pins open
(default)		30ms filter averaging time
J10Pin 2-Pin 3 shorted
(F1 tied to VCC1)
9J9Pin 2-Pin 3 shorted
(F0 tied to VCC1)		100ms filter averaging time
J10Pin 2-Pin 3 shorted
(F1 tied to VCC1)

The OUT_EN pin of the ISO1228 acts as the output enable control and is configurable with jumper J7. The available configurations of the OUT_EN/NC pin is shown in Table 2-4.

Table 2-4 OUT_EN Pin Jumper Description
JumperConfigurationDescription
J7All pins open (default)Output enabled (default)
Pin 1-Pin 2 shorted
(OUT_EN tied to Ground)		Output pins are tri-stated
Pin 2-Pin 3 shorted
(OUT_EN tied to VCC1)		Output enabled