NXP Semiconductors LPC84x, Руководство пользователя

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UM11029 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2017. All rights reserved.
User manual Rev. 1.0 — 16 June 2017 207 of 515
NXP Semiconductors
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Chapter 12: LPC84x General Purpose I/O (GPIO)
12.5.1 GPIO port byte pin registers
Each GPIO pin has a byte register in this address range. Software typically reads and
writes bytes to access individual pins, but can read or write halfwords to sense or set the
state of two pins, and read or write words to sense or set the state of four pins.
Table 254. Register overview: GPIO port (base address 0xA000 0000)
Name Access Address
offset
Description Reset
value Width Reference
B0 to B31 R/W 0x0000 to 0x001F Byte pin registers port 0 ext byte (8 bit) Table 255
B32 to B53 R/W 0x0020 to 0x0035 Byte pin registers port1; PIO1_0 to
PIO1_21 ext byte (8 bit) Table 255
- - 0x0036 to 0x003F Reserved - - -
W0 to W31 R/W 0x1000 to 0x107C Word pin registers port 0 ext word (32 bit) Table 256
W32 to W53 R/W 0x1080 to 0x10D4 Word pin registers port 1; PIO1_0 to
PIO1_21 ext word (32 bit) Table 256
DIR0 R/W 0x2000 Direction registers port 0 0 word (32 bit) Table 257
DIR1 R/W 0x2004 Direction registers port 1 0 word (32 bit) Table 257
MASK0 R/W 0x2080 Mask register port 0 0 word (32 bit) Table 258
MASK1 R/W 0x2084 Mask register port 1 0 word (32 bit) Table 258
PIN0 R/W 0x2100 Port pin register port 0 ext word (32 bit) Table 259
PIN1 R/W 0x2104 Port pin register port 1 ext word (32 bit) Table 259
MPIN0 R/W 0x2180 Masked port register port 0 ext word (32 bit) Table 260
SET0 R/W 0x2200 Write: Set register for port 0
Read: output bits for port 0 0 word (32 bit) Table 261
SET1 R/W 0x2204 Write: Set register for port 1
Read: output bits for port 1 0 word (32 bit) Table 261
CLR0 WO 0x2280 Clear port 0 - word (32 bit) Table 262
CLR1 WO 0x2284 Clear port 1 - word (32 bit) Table 262
NOT0 WO 0x2300 Toggle port 0 - word (32 bit) Table 263
NOT1 WO 0x2304 Toggle port 1 - word (32 bit) Table 263
DIRSET0 WO 0x2380 Set pin direction bits for port 0. 0 word (32 bit) Table 264
DIRSET1 WO 0x2384 Set pin direction bits for port 1. 0 word (32 bit) Table 264
DIRCLR0 WO 0x2400 Clear pin direction bits for port 0. - word (32 bit) Table 265
DIRCLR1 WO 0x2404 Clear pin direction bits for port 1. - word (32 bit) Table 265
DIRNOT0 WO 0x2480 Toggle pin direction bits for port 0. - word (32 bit) Table 266
DIRNOT1 WO 0x2484 Toggle pin direction bits for port 1. - word (32 bit) Table 266