LPC2194 datasheet(12/33 Pages) PHILIPS

12 / 33 page

Philips Semiconductors

LPC2194

Single-chip 16/32-bit microcontrollers

Preliminary data

Rev. 01 — 06 February 2004

12 of 33

9397 750 12757

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.

6.7 Pin function select register 0 (PINSEL0 - 0xE002C000)

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

Table 6. 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 6 are reserved, and should not be used

I2C

SI (state change)

SPI0

SPIF, MODF

SPI1

SPIF, MODF

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)

A/D

A/D Converter

CAN

1 ORed CAN Acceptance Filter

CAN1 (Tx int, Rx int)

20,21

CAN2 (Tx int, Rx int)

22,23

CAN3 (Tx int, Rx int)

24,25

CAN4 (Tx int, Rx int)

26,27

Table 4:

Interrupt sources…continued

Block

Flag(s)

VIC channel #

Table 5:

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

Table 6:

Pin function select register 0 (PINSEL0 - 0xE002C000)

PINSEL0

Pin name

Value

Function

Value after Reset

1:0

P0.0

GPIO Port 0.0

TxD (UART0)

PWM1

Reserved

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