NXP Semiconductors LPC24XX UM10237 - Manual (Page 191)

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User manual Rev. 04 — 26 August 2009 191 of 792
NXP Semiconductors
UM10237
Chapter 9: LPC24XX Pin connect
5.14 Pin Mode select register 1 (PINMODE1 - 0xE002 C044)
This register controls pull-up/pull-down resistor configuration for PORT0 pins 16 to 26. For
details see
Section 9–4 “Pin mode select register values” .
Remark: Pins P0.27 and P0.28 are dedicated I 2 C open drain pins without pull-up/down.
Pins P0.29, P0.30, P0.31 are USB specific pins without configurable pull-up or pull-down
resistors.
5.15 Pin Mode select register 2 (PINMODE2 - 0xE002 C048)
This register controls pull-up/pull-down resistor configuration for PORT1 pins 0 to 15. For
details see
Section 9–4 “Pin mode select register values” .
5.16 Pin Mode select register 3 (PINMODE3 - 0xE002 C04C)
This register controls pull-up/pull-down resistor configuration for PORT1 pins 16 to 31. For
details see
Section 9–4 “Pin mode select register values” .
5.17 Pin Mode select register 4 (PINMODE4 - 0xE002 C050)
This register controls pull-up/pull-down resistor configuration for PORT2 pins 0 to 15. For
details see
Section 9–4 “Pin mode select register values” .
Table 147. Pin Mode select register 1 (PINMODE1 - address 0xE002 C044) bit description
PINMODE1 Symbol Description Reset
value
1:0 P0.16MODE PORT0 pin 16 on-chip pull-up/down resistor control. 00
...
21:20 P0.26MODE PORT0 pin 26 on-chip pull-up/down resistor control. 00
31:21 - Reserved
Table 148. Pin Mode select register 2 (PINMODE2 - address 0xE002 C048) bit description
PINMODE2 Symbol Description Reset
value
1:0 P1.00MODE PORT1 pin 0 on-chip pull-up/down resistor control. 00
...
31:30 P1.15MODE PORT1 pin 15 on-chip pull-up/down resistor control. 00
Table 149. Pin Mode select register 3 (PINMODE3 - address 0xE002 C04C) bit description
PINMODE3 Symbol Description Reset
value
1:0 P1.16MODE PORT1 pin 16 on-chip pull-up/down resistor control. 00
...
31:30 P1.31MODE PORT1 pin 31 on-chip pull-up/down resistor control. 00