LPC2104FBD48SLASH01 datasheet(13/41 Pages) NXP

13 / 41 page

LPC2104_2105_2106_7

Product data sheet

Rev. 07 — 20 June 2008

13 of 41

NXP Semiconductors

LPC2104/2105/2106

Single-chip 32-bit microcontrollers

[1]

Available on LPC2104/2105/2106/01 only.

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 two registers as shown in Table 5.

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

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

UART 1

Rx Line Status (RLS)

Transmit Holding Register empty (THRE)

Rx Data Available (RDA)

Character Time-out Indicator (CTI)

Modem Status Interrupt (MSI)

Auto-Baud Time-Out (ABTO)[1]

End of Auto-Baud (ABEO)[1]

PWM0

Match 0 to 6 (MR0, MR1, MR2, MR3, MR4, MR5, MR6)

I2C-bus

SI (state change)

SPI and SSP[1]

SPIF, MODF (SPI)

TXRIS, RXRIS, RTRIS, RORRIS (SSP)[1]

reserved

PLL

PLL Lock (PLOCK)

RTC

RTCCIF (Counter Increment), RTCALF (Alarm)

System Control

External Interrupt 0 (EINT0)

System Control

External Interrupt 1 (EINT1)

System Control

External Interrupt 2 (EINT2)

Table 4.

Interrupt sources …continued

Block

Flag(s)

VIC channel #

Table 5.

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

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