Method for performing communication between sensor controller used for position detector and position indicator, position indicator, and sensor controller

摘要

When a signal from a position detector arrives through a casing instead of an electrode and the polarity of the signal obtained at the electrode is reversed, the position indicator is reversed and non-polarized. Data can be acquired without making a mistake in inversion determination. In the method according to the present invention, a sensor controller transmits a preamble signal (separation pattern STP) including a first chip sequence CN2 generated based on a predetermined code, and according to arbitrary data D1. A command signal (a signal including control information c2) including the second chip sequence CN2 obtained by adding the processing to the predetermined code is transmitted following the preamble signal, and the position indicator detects the detected preamble. Based on the polarity of the signal, the data D1 is decoded from the command signal detected subsequent to the preamble signal. [Selection] Figure 6