LPC2114 datasheet(17/34 Pages) PHILIPS

17 / 34 page

Philips Semiconductors

LPC2114/LPC2124

Single-chip 16/32-bit microcontrollers

Product data

Rev. 03 — 22 December 2004

17 of 34

9397 750 13145

6.9 Pin function select register 2 (PINSEL2 - 0xE002C014)

The PINSEL2 register controls the functions of the pins as per the settings listed in

Table 8. The direction control bit in the IODIR register is effective only when the GPIO

function is selected for a pin. For other functions direction is controlled automatically.

Settings other than those shown in the table are reserved, and should not be used.

6.10 General purpose parallel I/O

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.

6.10.1

Features

• Direction control of individual bits.

• Separate control of output set and clear.

• All I/O default to inputs after reset.

6.11 10-bit A/D converter

The LPC2114/LPC2124 each contain single 10-bit successive approximation analog

to digital converter with four multiplexed channels.

6.11.1

Features

• Measurement range of 0 V to 3 V.

• 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.

31:30

P0.31

Reserved

Table 7:

Pin function select register 1 (PINSEL1 - 0xE002C004)…continued

PINSEL1

Pin Name

Value

Function

Value after

Reset

Table 8:

Pin function select register 2 (PINSEL2 - 0xE002C014)

PINSEL2 bits

Description

Reset value

1:0

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.

31:4

31:30

Reserved

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