LPC2220 datasheet(18/50 Pages) NXP

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LPC2210_2220_6

Product data sheet

Rev. 06 — 11 December 2008

18 of 50

NXP Semiconductors

LPC2210/2220

16/32-bit ARM microcontrollers

6.5 Pin connect block

The pin connect block allows selected pins of the microcontroller to have more than one

function. Conﬁguration registers control the multiplexers to allow connection between the

pin and the on chip peripherals. Peripherals should be connected to the appropriate pins

prior to being activated, and prior to any related interrupt(s) being enabled. Activity of any

enabled peripheral function that is not mapped to a related pin should be considered

undeﬁned.

The pin control module contains three registers as shown in Table 6.

6.6 Pin function select register 0 (PINSEL0 - 0xE002 C000)

The PINSEL0 register controls the functions of the pins as per the settings listed in

Table 7. 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 Table 7 are reserved, and should not be used

Table 6.

Pin control module registers

Address

Name

Description

Access

0xE002 C000

PINSEL0

pin function select register 0

read/write

0xE002 C004

PINSEL1

pin function select register 1

read/write

0xE002 C014

PINSEL2

pin function select register 2

read/write

Table 7.

Pin function select register 0 (PINSEL0 - 0xE002 C000)

PINSEL0

Pin name

Value

Function

Value after reset

1:0

P0.0

GPIO Port 0.0

TXD0 (UART0)

PWM1

reserved

3:2

P0.1

GPIO Port 0.1

RXD0 (UART0)

PWM3

EINT0

5:4

P0.2

GPIO Port 0.2

SCL (I2C-bus)

Capture 0.0 (Timer 0)

reserved

7:6

P0.3

GPIO Port 0.3

01SDA (I2C-bus)

Match 0.0 (Timer 0)

EINT1

9:8

P0.4

GPIO Port 0.4

SCK (SPI0)

Capture 0.1 (Timer 0)

reserved

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