UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
1164 of 1269
45.1 How to read this chapter
The DAC is available on all LPC43xx parts.
45.2 Basic configuration
The DAC is configured as follows:
•
The DMA_ENA bit in the DAC control register (
) must be enabled to obtain
a valid DAC output.
•
See
for clocking and power control.
•
The DAC is reset by the DAC_RST (reset # 42).
•
The DAC interrupt is connected to interrupt slot # 0 in the NVIC.
•
For connecting to the GPDMA, use the DMAMUX register (
block and enable the GPDMA channel in the DMA Channel Configuration registers
45.3 Features
•
10-bit resolution
•
Monotonic by design (resistor string architecture)
•
Controllable conversion speed
•
Can be optimized for speed and power
•
Low power consumption
•
Maximum update rate of 1 MHz
•
DMA support
45.4 Pin description
gives a brief summary of each of DAC related pins.
UM10503
Chapter 45: LPC43xx DAC
Rev. 1.3 — 6 July 2012
User manual
Table 1015.DAC clocking and power control
Base clock
Branch clock
Operating
frequency
Notes
Clock to the DAC register
interface and rate clock for the
DMA counter.
BASE_APB3_CLK CLK_APB3_DAC
up to
204 MHz
-