2.3.1 Interfacing Signals

The MCP16503 is interfaced to the host MPU by means of the following signals: nSTRTO (open-drain output), nRSTO (open-drain output), nINTO (open-drain output), PWRHLD (input), LPM (input) and HPM (input). SDA and SCL are I²C interface pins. The MCP16503 is a target-only device without clock-stretching capability and therefore the SCL pin is an input only. Further details about the I²C interface of the MCP16503 are given in section I²C Interface Description.

The ESD protection on each interfacing signal is purposely designed to prevent any leakage from the MPU IOs, even in the case where the main input power is removed from the MCP16503.