UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
809 of 1269
NXP Semiconductors
UM10503
Chapter 28: LPC43xx State Configurable Timer (SCT)
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32 states
28.4 General description
The State Configurable Timer (SCT) allows a wide variety of timing, counting, output
modulation, and input capture operations.
The most basic user-programmable option is whether a SCT operates as two 16-bit
counters or a unified 32-bit counter. In the two-counter case, in addition to the counter
value the following operational elements are independent for each half:
•
State variable
•
Limit, halt, stop, and start conditions
•
Values of Match/Capture registers, plus reload or capture control values
In the two-counter case, the following operational elements are global to the SCT:
•
Clock selection
•
Inputs
•
Events
•
Outputs
•
Interrupts
•
DMA requests
Events, outputs, interrupts, and DMA requests can use match conditions from either
counter.
Remark:
This document uses the term “bus error” to indicate an SCT response that
makes the processor take an exception.
Fig 87. SCT block diagram
prescaler(s)
SCT clock
CLK_M4_SCT