lpc2939fbd208 NXP Semiconductors, lpc2939fbd208 Datasheet - Page 41

• Manufacturer Part Number: lpc2939fbd208
• Description: Arm9 Microcontroller With Can, Lin, And Usb
• Manufacturer: NXP Semiconductors

NXP Semiconductors
LPC2939_1
Preliminary data sheet
6.15.1 Functional description
The MSCSS contains Pulse-Width Modulators (PWMs), Analog-to-Digital Converters
(ADCs) and timers.
Figure 8
communication with the AHB system bus. Two internal timers are dedicated to this
subsystem. MSCSS timer 0 can be used to generate start pulses for the ADCs and the
first PWM. The second timer (MSCSS timer 1) is used to generate ‘carrier’ signals for the
PWMs. These carrier patterns can be used, for example, in applications requiring current
control. Several other trigger possibilities are provided for the ADCs (external, cascaded
or following a PWM). The capture inputs of both timers can also be used to capture the
start pulse of the ADCs.
The PWMs can be used to generate waveforms in which the frequency, duty cycle and
rising and falling edges can be controlled very precisely. Capture inputs are provided to
measure event phases compared to the main counter. Depending on the applications,
these inputs can be connected to digital sensor motor outputs or digital external signals.
Interrupt signals are generated on several events to closely interact with the CPU.
The ADCs can be used for any application needing accurate digitized data from analog
sources. To support applications like motor control, a mechanism to synchronize several
PWMs and ADCs is available (sync_in and sync_out).
Note that the PWMs run on the PWM clock and the ADCs on the ADC clock, see
Section
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Two 10-bit, 400 ksamples/s, 8-channel ADCs with 3.3 V inputs and various trigger-
start options
One 10-bit, 400 ksamples/s, 8-channel ADC with 5 V inputs (5 V measurement range)
and various trigger-start options
Four 6-channel PWMs (Pulse-Width Modulators) with capture and trap functionality
Two dedicated timers to schedule and synchronize the PWMs and ADCs
Quadrature encoder interface
6.16.2.
provides an overview of the MSCSS. An AHB-to-APB bus bridge takes care of
Rev. 01 — 11 June 2009
ARM9 microcontroller with CAN, LIN, and USB
LPC2939
© NXP B.V. 2009. All rights reserved.
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