LPC2131 datasheet(15/41 Pages) PHILIPS

15 / 41 page

9397 750 14868

Preliminary data sheet

Rev. 02 — 15 April 2005

15 of 41

Philips Semiconductors

LPC2131/2132/2134/2136/2138

Single-chip 16/32-bit microcontrollers

6.6 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 5.

SPI0

SPIF, MODF

SSP

TX FIFO at least half empty (TXRIS)

RX FIFO at least half full (RXRIS)

Receive Timeout (RTRIS)

Receive Overrun (RORRIS)

PLL

PLL Lock (PLOCK)

RTC

RTCCIF (Counter Increment), RTCALF (Alarm)

System Control

External Interrupt 0 (EINT0)

External Interrupt 1 (EINT1)

External Interrupt 2 (EINT2)

External Interrupt 3 (EINT3)

AD0

A/D Converter 0

I2C1

SI (state change)

BOD

Brown Out Detect

AD1

A/D Converter 1 (Available in LPC2134/2136/2138 only)

Table 4:

Interrupt sources …continued

Block

Flag(s)

VIC channel #

Table 5:

Pin control module registers

Address

Name

Description

Access

0xE002C000

PINSEL0

Pin function select register 0

Read/Write

0xE002C004

PINSEL1

Pin function select register 1

Read/Write

0xE002C014

PINSEL2

Pin function select register 2

Read/Write

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