Product specifications

R01AN0168ED0101 Rev. 01.01 9
Application Note
Chapter 2 General Notices
2.1 Abbreviations in this Application Note
Typically, all variables and register settings are written by 3- or 4-letter-
abbreviations. These abbreviations can be identified within the User’s Manual
by looking at the register and bit names of ISM, and skipping some common
letters like “ISM
xG” (for global settings), “ISMxC” (for channel related settings),
“ISM
xS/I/F” (for sign, integer and fraction of parameters and variables).
Note The letter “n” is used to distinguish between channels, i.e., it is a channel
index.
2.2 The Initial State
After the Hardware RESET, the ISM function is set to a passive default state.
• Channel Management is disabled (GCE is cleared).
• All PWM output channels have a 0% duty cycle (PWM off) setting.
• The Quadrant of all channels is set to 0.
• The central Time Base counter is running at its slowest speed.
•The Channel Management update speed is set to its slowest speed.
• All Interrupts are disabled.
• The linkage of ISM and the analogue ZPD hardware is disabled.
2.2.1 Functionality of GCE (Channel Management Enable)
By clearing GCE, the Channel Management (CM) is stopped. Stopping is
performed synchronously, i.e., when
GCE is cleared, the current processing of
all channels is completed. After
GCB is cleared, the CM is effectively stopped.
PWM and all other output settings remain active as set on the last
CM pass. In
this state, all parameters and variables can be redefined arbitrarily.
2.2.2 Analogue Part Linkage (GZL)
Whenever Zero Point Detection (ZPD) is used within your application, always
set the
GZL flag. This activates the linkage between the digital and analogue
components of port and ISM.
Note If GZL is not activated, all settings of GCS, GZF, GRV, GFD, GFL, GZO, GZP
and GZE are blocked, so that ZPD operations cannot be performed.