LPC2131 Philips Semiconductors (Acquired by NXP), LPC2131 Datasheet - Page 17

• Manufacturer Part Number: LPC2131
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
9397 750 14008
Preliminary data sheet
6.10.1 Features
6.11.1 Features
6.12.1 Features
6.10 General purpose parallel I/O
6.11 10-bit A/D converter
6.12 10-bit D/A converter
Table 8:
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 setting or clearing 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.
The LPC2131/32 contain one and the LPC2138 contains two analog to digital converters.
These converters are single 10-bit successive approximation analog to digital converters
with eight multiplexed channels.
This peripheral is available in the LPC2138 only. The D/A converter enables the LPC2138
to generate variable analog output.
PINSEL2 bits
1:0
2
3
31:30
•
•
•
•
•
•
•
•
•
•
•
•
Direction control of individual bits.
Separate control of output set and clear.
All I/O default to inputs after reset.
Measurement range of 0 V to 3.3 V.
Each converter capable of performing more than 400,000 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 (LPC2138 only).
10 bit digital to analog converter.
Buffered output.
Power-down mode available.
Selectable speed versus power.
Pin function select register 2 (PINSEL2 - 0xE002C014)
Description
Reserved
When 0, pins P1.31:26 are GPIO pins. When 1,
P1.31:26 are used as Debug port.
When 0, pins P1.25:16 are used as GPIO pins. When 1,
P1.25:16 are used as Trace port.
Reserved
Rev. 01 — 18 November 2004
LPC2131/2132/2138
Single-chip 16/32-bit microcontrollers
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Reset value
-
0
0
-
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