LPC2131 datasheet(17/39 Pages) NXP

17 / 39 page

LPC2131_32_34_36_38_4

Product data sheet

Rev. 04 — 16 October 2007

17 of 39

NXP Semiconductors

LPC2131/32/34/36/38

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

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