How are the DS21x5y, DS215y, or other telecommunication devices initialized?
A1. Some devices like the DS2155 T1/E1 SCT or DS2148 LIU, offer a power-on reset and a hardware reset pin that clears out all the registers. Other devices require software to write a 0x00 to address space 0x00 to 0xFF, regardless of register type or documented presence. This ensures that all of the registers are cleared and the device is in normal operation mode.
