Datasheet

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) 8

C-bus SI (state change) 9

SPI and SSP

[1]

SPIF, MODF (SPI)

TXRIS, RXRIS, RTRIS, RORRIS (SSP)

[1]

- reserved 11

PLL PLL Lock (PLOCK) 12

RTC RTCCIF (Counter Increment), RTCALF (Alarm) 13

System Control External Interrupt 0 (EINT0) 14

System Control External Interrupt 1 (EINT1) 15

System Control External Interrupt 2 (EINT2) 16

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