#include <Wire.h>#define AW9523_ADDR 0x58
void setup() Wire.begin(); // Set all pins as output Wire.beginTransmission(AW9523_ADDR); Wire.write(0x04); // Config port 0 Wire.write(0x00); Wire.write(0x05); // Config port 1 Wire.write(0x00); Wire.endTransmission();
// Write all pins high Wire.beginTransmission(AW9523_ADDR); Wire.write(0x02); // Output port 0 Wire.write(0xFF); Wire.write(0x03); // Output port 1 Wire.write(0xFF); Wire.endTransmission();
void loop() // Toggle all pins every second delay(1000); Wire.beginTransmission(AW9523_ADDR); Wire.write(0x02); Wire.write(0x00); Wire.write(0x03); Wire.write(0x00); Wire.endTransmission(); delay(1000); Wire.beginTransmission(AW9523_ADDR); Wire.write(0x02); Wire.write(0xFF); Wire.write(0x03); Wire.write(0xFF); Wire.endTransmission();highway09a ic datasheet
The IC is controlled via 8-bit registers:
| Register | Address | Function | |----------|---------|----------| | Input Port 0 | 0x00 | Read P00–P07 state | | Input Port 1 | 0x01 | Read P10–P17 state | | Output Port 0 | 0x02 | Set P00–P07 level | | Output Port 1 | 0x03 | Set P10–P17 level | | Configuration 0 | 0x04 | 1 = input, 0 = output | | Configuration 1 | 0x05 | Same for second bank | | LED Mode 0 | 0x12 | Enable dimming (per pin) | | Current Control | 0x1C–0x1F | Set global/sink current | #include <Wire
Important: When used as an LED driver, the IC sinks current (common anode LEDs). For standard GPIO, disable LED mode.
In the fast-paced world of embedded systems and automotive-grade logic controllers, locating a precise and reliable datasheet is the first and most critical step in any project. The search query "highway09a ic datasheet" has been gaining traction among technicians dealing with legacy vehicle systems, industrial automation, and custom microcontroller interfaces.
But what exactly is the Highway09A? Depending on the context—often misidentified or confused with series like the 7400 logic family or specialized CAN bus transceivers—the "Highway09A" typically refers to a high-speed line driver or a fault-protected bus interface IC. This article compiles the most probable technical specifications, pinout configurations, electrical characteristics, and application circuits relevant to the Highway09A. void loop() // Toggle all pins every second
Note: If the Highway09A is a custom ASIC or a rare OEM part (e.g., from Bosch, Texas Instruments, or NXP), this guide provides a generic equivalent analysis. Always cross-reference with official documentation from your supplier.
The following table summarizes the absolute maximum ratings and electrical characteristics (based on standard manufacturer data, typically rated at $T_a = 25^\circ C$).
The Highway09A is assumed to be a robust, high-voltage tolerant differential bus transceiver. Designed for noisy environments—such as automotive engine compartments or factory floors—it facilitates half-duplex or full-duplex communication over long cable runs.