Accessory Control Interface ACI

ACI is a point-to-point, master-slave, and bi-directional serial bus. It has three features The insertion and removal detection of an accessory device Acting as a data bus, intended mainly for control purposes The identification and authentication of accessory type which is connected The accessories are detected by the HeadInt signal when the plug is inserted. Normally when no plug is present, the pull-up resistor 100k pulls up the HeadInt signal to VFLASH1. If the accessory is inserted, the...