NXP Semiconductors LPC11U3x

UM10462 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2016. All rights reserved.
User manual Rev. 5.5 — 21 December 2016 127 of 523
NXP Semiconductors
UM10462
Chapter 7: LPC11U3x/2x/1x I/O configuration
7.4.1.55 PIO1_31 register
10 OD Open-drain mode. 0
0 Disable.
1 Open-drain mode enabled.
Remark: This is not a true open-drain mode.
31:11 - - Reserved. 0
Table 129. PIO1_29 register (PIO1_29, address 0x4004 40D4) bit description
…continued
Bit Symbol Value Description Reset
value
Table 130. PIO1_31 register (PIO1_31, address 0x4004 40DC) bit description
Bit Symbol Value Description Reset
value
2:0 FUNC Selects pin function. Values 0x1 to 0x7 are reserved. 000
0x0 PIO1_31.
4:3 MODE Selects function mode (on-chip pull-up/pull-down resistor
control).
10
0x0 Inactive (no pull-down/pull-up resistor enabled).
0x1 Pull-down resistor enabled.
0x2 Pull-up resistor enabled.
0x3 Repeater mode.
5 HYS Hysteresis. 0
0 Disable.
1 Enable.
6 INV Invert input 0
0 Input not inverted (HIGH on pin reads as 1, LOW on pin reads
as 0).
1 Input inverted (HIGH on pin reads as 0, LOW on pin reads as
1).
9:7 - - Reserved. 001
10 OD Open-drain mode. 0
0 Disable.
1 Open-drain mode enabled.
Remark: This is not a true open-drain mode.
31:11 - - Reserved. 0