TC1775 Datasheet, PDF (38/101 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller

TC1775
Preliminary
The General Purpose Timer Array (GPTA) provides a set of hardware modules required
for high speed digital signal processing:
• Filter and Prescaler Cells (FPC) support input noise filtering and prescaler operation.
• Phase Discrimination Logic units (PDL) decode the direction information output by a
rotation tracking system.
• Duty Cycle Measurement Cells (DCM) provide pulse width measurement capabilities.
• A Digital Phase Locked Loop unit (PLL) generates a programmable number of GPTA
module clock ticks during an input signal’s period.
• Global Timer units (GT) driven by various clock sources are implemented to operate
as a time base for the associated “Global Timer Cells”.
• Global Timer Cells (GTC) can be programmed to capture the contents of a Global
Timer on an event that occurred at an external port pin or at an internal FPC output.
A GTC may be also used to control an external port pin with the result of an internal
compare operation. GTCs can be logically concatenated to provide a common
external port pin with a complex signal waveform.
• Local Timer Cells (LTC) operating in Timer, Capture, or Compare Mode may be also
logically tied together to drive a common external port pin with a complex signal
waveform. LTCs — enabled in Timer Mode or Capture Mode — can be clocked or
triggered by
– A prescaled GPTA module clock,
– An FPC, PDL, DCM, PLL, or GTC output signal line,
– An external port pin.
Some input lines driven by processor I/O pads may be shared by an LTC and a GTC to
trigger their programmed operation simultaneously.
The following list summarizes all blocks supported:
Clock Generation Unit (GPTA)
• Filter and Prescaler Cell (FPC):
– Six independent units
– Three operating modes (Prescaler, Delayed Debounce Filter, Immediate Debounce
Filter)
– f_GPTA down-scaling capability
– f_GPTA/2 maximum input signal frequency in Filter Mode
• Phase Discriminator Logic (PDL):
– Two independent units
– Two operating modes (2 and 3 sensor signals)
– f_GPTA/4 maximum input signal frequency in 2-sensor mode, f_GPTA/6 maximum input
signal frequency in 3-sensor mode
• Duty Cycle Measurement (DCM):
– Four independent units
– 0 to 100% margin and time-out handling
Data Sheet
34
V1.2, 2002-05