LPC2131/32/34/36/38
NXP Semiconductors
Single-chip 16/32-bit microcontrollers
6.7.2 Fast I/O features available in LPC213x/01 only
• Fast I/O registers are located on the ARM local bus for the fastest possible I/O timing.
• All GPIO registers are byte addressable.
• Entire port value can be written in one instruction.
• Mask registers allow single instruction to set or clear any number of bits in one port.
6.8 10-bit ADC
The LPC2131/32 contain one and the LPC2134/36/38 contain two ADCs. These
converters are single 10-bit successive approximation ADCs with eight multiplexed
channels.
6.8.1 Features
• Measurement range of 0 V to 3.3 V.
• Each converter capable of performing more than 400000 10-bit samples per second.
• 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 (LPC2134/36/38 only).
6.8.2 ADC features available in LPC213x/01 only
• Every analog input has a dedicated result register to reduce interrupt overhead.
• Every analog input can generate an interrupt once the conversion is completed.
6.9 10-bit DAC
This peripheral is available in the LPC2132/34/36/38 only. The DAC enables the
LPC2132/34/36/38 to generate variable analog output.
6.9.1 Features
• 10-bit digital to analog converter.
• Buffered output.
• Power-down mode available.
• Selectable speed versus power.
6.10 UARTs
The LPC2131/32/34/36/38 each contain two UARTs. In addition to standard transmit and
receive data lines, the LPC2134/36/38 UART1 also provides a full modem control
handshake interface.
6.10.1 Features
• 16 B Receive and Transmit FIFOs.
• Register locations conform to 16C550 industry standard.
• Receiver FIFO trigger points at 1 B, 4 B, 8 B, and 14 B
LPC2131_32_34_36_38
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© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5.1 — 29 July 2011
17 of 45
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