LPC2290 datasheet(18/41 Pages) PHILIPS

18 / 41 page

Philips Semiconductors

LPC2290

16/32-bit ARM microcontrollers with external memory interface

Preliminary data

Rev. 01 — 09 February 2004

18 of 41

9397 750 12874

6.8 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.

27:26

P0.29

GPIO Port 0.29

AIN2 (A/D converter)

Capture 0.3 (Timer0)

Match 0.3 (Timer0)

29:28

P0.30

GPIO Port 0.30

AIN3 (A/D converter)

EINT3

Capture 0.0 (Timer0)

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 P1.36:26 are used as GPIO pins. When 1, P1.31:26 are used as a

Debug port.

P1.26/RTCK

When 0, pins P1.25:16 are used as GPIO pins. When 1, P1.25:16 are used as a

Trace port.

P1.20/

TRACESYNC

5:4

Controls the use of the data bus and strobe pins:

BOOT1:0

Pins P2.7:0

11 = P2.7:0

0x or 10 = D7:0

Pin P1.0

11 = P1.0

0x or 10 = CS0

Pin P1.1

11 = P1.1

0x or 10 = OE

Pin P3.31

11 = P3.31

0x or 10 = BLS0

Pins P2.15:8

00 or 11 = P2.15:8

01 or 10 = D15:8

Pin P3.30

00 or 11 = P3.30

01 or 10 = BLS1

Pins P2.27:16

0x or 11 = P2.27:16

10 = D27:16

Pins P2.29:28

0x or 11 = P2.29:28 or reserved

10 = D29:28

Pins P2.31:30

0x or 11 = P2.31:30 or AIN5:4

10 = D31:30

Pins P3.29:28

0x or 11 = P3.29:28 or AIN6:7

10 = BLS2:3

If bits 5:4 are not 10, controls the use of pin P3.29: 0 enables P3.29, 1 enables

AIN6.

If bits 5:4 are not 10, controls the use of pin P3.28: 0 enables P3.28, 1 enables

AIN7.

Controls the use of pin P3.27: 0 enables P3.27, 1 enables WE.

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