UM10503
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User manual
Rev. 1.3 — 6 July 2012
301 of 1269
NXP Semiconductors
UM10503
Chapter 15: LPC43xx System Control Unit (SCU)/ IO configuration
15.4.10 Pin interrupt select register 0
This register selects one GPIO pin from all GPIO pins on all ports as the source for pin
interrupts 0 to 3.
Example: For pin interrupt 1, INTPIN1 = 0xA and PORTSEL1 = 1 select GPIO pin
GPIO1[10] located on pin P2_9 to generate an interrupt. Each pin interrupt must be
enabled in the NVIC.
To enable each pin interrupt and configure its edge or level sensitivity, use the GPIO pin
interrupt registers (see
Table 144. EMC clock delay register (EMCDELAYCLK, address 0x4008 6D00) bit description
Bit
Symbol
Description
Reset
value
Access
15:0
CLK_DELAY
EMC_CLKn SDRAM clock output delay.
0x0 = no delay
0x1111
0.5 ns delay
0x2222
1.0 ns delay
0x3333
1.5 ns delay
0x4444
2.0 ns delay
0x5555
2.5 ns delay
0x6666
3.0 ns delay
0x7777
3.5 ns delay
0
R/W
31:16
-
Reserved. Do not write ones to reserved register bits.
-
-
Table 145. Pin interrupt select register 0 (PINTSEL0, address 0x4008 6E00) bit description
Bit
Symbol
Value
Description
Reset
value
4:0
INTPIN0
Pint interrupt 0: Select the pin number within the GPIO port
selected by the PORTSEL0 bit in this register.
0
7:5
PORTSEL0
Pin interrupt 0: Select the port for the pin number to be
selected in the INTPIN0 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
12:8
INTPIN1
Pint interrupt 1: Select the pin number within the GPIO port
selected by the PORTSEL1 bit in this register.
0