LPC2104 datasheet(15/32 Pages) PHILIPS

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Philips Semiconductors

LPC2104/2105/2106

Single-chip 32-bit microcontrollers

Product data

Rev. 04 — 05 February 2004

15 of 32

9397 750 12792

6.9 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.

6.9.1

Features

• Direction control of individual bits.

• Separate control of output set and clear.

• All I/O default to inputs after reset.

Table 7:

Pin function select register 1 (PINSEL1 - 0xE002C004)

PINSEL1

Pin Name

Value

Function

Value after

Reset

1:0

P0.16

GPIO Port 0.16

EINT0

Match 0.2 (Timer 0)

3:2

P0.17

GPIO Port 0.17

Capture 1.2 (Timer 1)

5:4

P0.18

GPIO Port 0.18

Capture 1.3 (Timer 1)

7:6

P0.19

GPIO Port 0.19

Match 1.2 (Timer 1)

9:8

P0.20

GPIO Port 0.20

Match 1.3 (Timer 1)

11:10

P0.21

GPIO Port 0.21

PWM5

13:12

P0.22

GPIO Port 0.22

15:14

P0.23

GPIO Port 0.23

17:16

P0.24

GPIO Port 0.24

19:18

P0.25

GPIO Port 0.25

21:20

P0.26

GPIO Port 0.26

23:22

P0.27

GPIO Port 0.27

TRST

25:24

P0.28

GPIO Port 0.28

TMS

27:26

P0.29

GPIO Port 0.29

TCK

29:28

P0.30

GPIO Port 0.30

TDI

31:30

P0.31

GPIO Port 0.31

TDO

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