LPC2144 NXP [NXP Semiconductors], LPC2144 Datasheet - Page 15

• Manufacturer Part Number: LPC2144
• Description: Single-chip 16-bit/32-bit microcontrollers; up to 512 kB flash with ISP/IAP, USB 2.0 full-speed device, 10-bit ADC and DAC
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
LPC2141_42_44_46_48_3
Product data sheet
6.7.1 Features
6.8.1 Features
6.7 Fast general purpose parallel I/O (GPIO)
6.8 10-bit ADC
Device pins that are not connected to a specific peripheral function are controlled by the
GPIO registers. Pins may be dynamically configured as inputs or outputs. Separate
registers allow the setting or clearing of any number of outputs simultaneously. The value
of the output register may be read back, as well as the current state of the port pins.
LPC2141/42/44/46/48 introduce accelerated GPIO functions over prior LPC2000 devices:
The LPC2141/42 contain one and the LPC2144/46/48 contain two analog to digital
converters. These converters are single 10-bit successive approximation analog to digital
converters. While ADC0 has six channels, ADC1 has eight channels. Therefore, total
number of available ADC inputs for LPC2141/42 is 6 and for LPC2144/46/48 is 14.
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GPIO registers are relocated to the ARM local bus for the fastest possible I/O timing
Mask registers allow treating sets of port bits as a group, leaving other bits unchanged
All GPIO registers are byte addressable
Entire port value can be written in one instruction
Bit-level set and clear registers allow a single instruction to set or clear any number of
bits in one port
Direction control of individual bits
Separate control of output set and clear
All I/O default to inputs after reset
10 bit successive approximation analog to digital converter
Measurement range of 0 V to VREF (2.0 V
Each converter capable of performing more than 400000 10-bit samples per second
Every analog input has a dedicated result register to reduce interrupt overhead
Burst conversion mode for single or multiple inputs
Optional conversion on transition on input pin or timer match signal
Global Start command for both converters (LPC2142/44/46/48 only)
Rev. 03 — 19 October 2007
LPC2141/42/44/46/48
Single-chip 16-bit/32-bit microcontrollers
VREF
V
DDA
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© NXP B.V. 2007. All rights reserved.
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