UM10503
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
985 of 1441
31.1 How to read this chapter
The SCT with dither engine is available on all flash-based LPC43xx/LPC43Sxx parts. The
SCT implemented here is identical to the SCT implemented for flashless parts except for
the following additions:
•
Dither engine and fractional match registers
•
Automatic limits
•
Holding of match events until a qualifying event occurs
•
Event enabling based on count direction
All SCT functions available in the flashless parts are also available in the SCT with dither
engine. See
Chapter 30 “LPC43xx/LPC43Sxx State Configurable Timer (SCT)”
for the
following sections which apply to both versions of the SCT with or without the dither
engine:
Section 30.2 “Basic configuration”
Section 30.4 “General description”
Section 30.5 “Pin description”
Section 30.7 “Functional description”
31.2 Features
•
Two 16-bit counters or one 32-bit counter.
•
Counters clocked by bus clock or selected input.
•
Up counters or up-down counters.
•
State variable allows sequencing across multiple counter cycles.
•
The following conditions define an event: a counter match condition, an input (or
output) condition, a combination of a match and/or and input/output condition in a
specified state.
•
Events control outputs, interrupts, and DMA requests.
–
Match register 0 can be used as an automatic limit.
–
In bi-directional mode, events can be enabled based on the count direction,
–
Match events can be held until another qualifying event occurs.
•
Selected events can limit, halt, start, or stop a counter.
•
Supports:
–
8 inputs
–
16 outputs
–
16 match/capture registers
–
16 events
UM10503
Chapter 31: LPC43xx/LPC43Sxx State Configurable Timer
(SCT) with dither engine
Rev. 2.1 — 10 December 2015
User manual