SPC560P54x datasheet(18/105 Pages) STMICROELECTRONICS

18 / 105 page

Introduction

SPC56xP54x, SPC56xP60x

18/105

DocID18340 Rev 6



Triangle wave modulation



Programmable modulation depth (±0.25% to ±4% deviation from center frequency)

–

Programmable modulation frequency dependent on reference frequency



Self-clocked mode (SCM) operation

1.5.9

Main oscillator

The main oscillator provides these features:



Input frequency range 4 MHz to 40 MHz



Crystal input mode or Oscillator input mode



PLL reference

1.5.10

Internal RC oscillator

This device has an RC ladder phase-shift oscillator. The architecture uses constant current

charging of a capacitor. The voltage at the capacitor is compared by the stable bandgap

reference voltage.

The RC Oscillator provides these features:



Nominal frequency 16 MHz



±6% variation over voltage and temperature after process trim



Clock output of the RC oscillator serves as system clock source in case loss of lock or

loss of clock is detected by the PLL



RC oscillator is used as the default system clock during startup

1.5.11

Periodic interrupt timer (PIT)

The PIT module implements these features:



Up to four general purpose interrupt timers



32-bit counter resolution



Clocked by system clock frequency



Each channel can be used as trigger for a DMA request

1.5.12

System timer module (STM)

The STM module implements these features:



32-bit up counter with 8-bit prescaler

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Four 32-bit compare channels

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Independent interrupt source for each channel



Counter can be stopped in debug mode

The STM module is replicated for each processor.

SPC560P54x Datasheet(PDF) 18 Page - STMicroelectronics

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