2.0 AMS 1-WIRE - Programming Interface
2.1 Overview of the AMS 1-WIRE Programming Interface
The programming of the AMS AS5163 and AS5263 devices is performed over a proprietary AMS
‘single-pin Interface’. This interface supports bi-directional communications with the target device from the programmer. The ‘single-pin Interface’ is shared with the analogue output pin (OUT pin) of the AMS device which means that the external programmer must place the target device in a special
‘communications mode’ in order to program the device.
The schematic below is taken from the datasheet for the AS5163 device and shows the connections between a ‘programmer’ and a typical AS5163 target board (UUT).
Important note:
A pull-up resistor is required between VDD and the AMS OUT pin in order for the ‘communications mode’ to operate. This resistor is only required during programming. It could be connected within the probe bed of the test fixture or across the programmer ‘Target Vcc’ and 0V pins.
Application Note 134 - In-System Programming (ISP) of the AMS AS5163 / AS5263 devices via the single-pin interface 13
