Nxp semiconductors – NXP Semiconductors LPC24XX UM10237 User Manual
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UM10237_4
© NXP B.V. 2009. All rights reserved.
User manual
Rev. 04 — 26 August 2009
778 of 792
NXP Semiconductors
UM10237
Chapter 36: LPC24XX Supplementary information
Chapter 10: LPC24XX General Purpose Input/Output (GPIO)
How to read this chapter . . . . . . . . . . . . . . . . 194
Basic configuration . . . . . . . . . . . . . . . . . . . . 194
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Digital I/O ports . . . . . . . . . . . . . . . . . . . . . . . 194
Interrupt generating digital ports . . . . . . . . . . 195
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Pin description . . . . . . . . . . . . . . . . . . . . . . . . 196
Register description . . . . . . . . . . . . . . . . . . . 196
GPIO interrupt registers . . . . . . . . . . . . . . . . 207
GPIO Interrupt Clear register (IO0IntClr -
0xE002 808C and IO2IntClr - 0xE002 80AC) 208
GPIO usage notes . . . . . . . . . . . . . . . . . . . . . 209
Example 1: sequential accesses to IOSET and
IOCLR affecting the same GPIO pin/bit . . . . 209
Writing to IOSET/IOCLR vs. IOPIN . . . . . . . 210
How to read this chapter . . . . . . . . . . . . . . . . 211
Basic configuration . . . . . . . . . . . . . . . . . . . . 211
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
Ethernet architecture. . . . . . . . . . . . . . . . . . . 213
Partitioning . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Example PHY Devices . . . . . . . . . . . . . . . . . 215
DMA engine functions . . . . . . . . . . . . . . . . . 215
Overview of DMA operation . . . . . . . . . . . . . 216
Ethernet Packet . . . . . . . . . . . . . . . . . . . . . . 216
Pin description . . . . . . . . . . . . . . . . . . . . . . . 217
Register description . . . . . . . . . . . . . . . . . . . 218
Ethernet MAC register definitions . . . . . . . . 220
MAC Configuration Register 1 (MAC1 -
0xFFE0 0000) . . . . . . . . . . . . . . . . . . . . . . . 221
MAC Configuration Register 2 (MAC2 -
0xFFE0 0004) . . . . . . . . . . . . . . . . . . . . . . . 221