SX1503

WIRELESS & SENSING SX1501/SX1502/SX1503 4/8/16 Channel Low Voltage GPIO SX1501/SX1502/SX1503 4/8/16 Channel Low Voltage GPIO with NINT and NRESET GENERAL DESCRIPTION The SX1501, SX1502 and SX1503 are complete ultra low voltage General Purpose parallel Input/Output (GPIO) expanders ideal for low power handheld battery powered equipment. They allow easy serial expansion of I/O through a standard I2C interface. GPIO devices can provide additional control and monitoring when the microcontroller or chipset has insufficient I/O ports, or in systems where serial communication and control from a remote location is advantageous. These devices can also act as a level shifter to connect a microcontroller running at one voltage level to a component running at a different voltage level. The core is operating as low as 1.2V while the I/O banks can operate between 1.2V and 5.5V independent of the core voltage and each other. Each GPIO is programmable via 8-bit configuration registers. Data registers, direction registers, pullup/pull-down registers, interrupt mask registers and interrupt registers allow the system master to program and configure 4 or 8 or 16-GPIOs using a standard 400kHz I2C interface. The SX1501, SX1502 and SX1503 offer a unique fully programmable logic functions like a PLD to give more flexibility and reduce external logic gates used for standard applications. The SX1501, SX1502 and SX1503 have the ability to generate mask-programmable interrupts based on falling/rising...