UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
302 of 1269
NXP Semiconductors
UM10503
Chapter 15: LPC43xx System Control Unit (SCU)/ IO configuration
15.4.11 Pin interrupt select register 1
This register selects one GPIO pin from all GPIO pins on all ports as the source for pin
interrupts 4 to 7.
Example: For pin interrupt 4, INTPIN4 = 0xA and PORTSEL4 = 1 select GPIO pin
GPIO1[10] located on pin P2_9 to generate an interrupt. Each pin interrupt must be
enabled in the NVIC using interrupt slots 32 to 39.
15:13
PORTSEL1
Pin interrupt 1: Select the port for the pin number to be
selected in the INTPIN1 bits of this register.
0
0x0
GPIO Port 0
0x1
GPIO Port 1
0x2
GPIO Port 2
0x3
GPIO Port 3
0x4
GPIO Port 4
0x5
GPIO Port 5
0x6
GPIO Port 6
0x7
GPIO Port 7
20:16
INTPIN2
Pint interrupt 2: Select the pin number within the GPIO port
selected by the PORTSEL2 bit in this register.
0
23:21
PORTSEL2
Pin interrupt 2: Select the port for the pin number to be
selected in the INTPIN2 bits of this register.
0
0x0
GPIO Port 0
0x1
GPIO Port 1
0x2
GPIO Port 2
0x3
GPIO Port 3
0x4
GPIO Port 4
0x5
GPIO Port 5
0x6
GPIO Port 6
0x7
GPIO Port 7
28:24
INTPIN3
Pint interrupt 3: Select the pin number within the GPIO port
selected by the PORTSEL3 bit in this register.
0
31:29
PORTSEL3
Pin interrupt 3: Select the port for the pin number to be
selected in the INTPIN3 bits of this register.
0
0x0
GPIO Port 0
0x1
GPIO Port 1
0x2
GPIO Port 2
0x3
GPIO Port 3
0x4
GPIO Port 4
0x5
GPIO Port 5
0x6
GPIO Port 6
0x7
GPIO Port 7
Table 145. Pin interrupt select register 0 (PINTSEL0, address 0x4008 6E00) bit description
Bit
Symbol
Value
Description
Reset
value