UM10360 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
User manual Rev. 3 — 19 December 2013 117 of 841
NXP Semiconductors
UM10360
Chapter 8: LPC176x/5x Pin connect block
[1] Not available on 80-pin package.
[2] Port 0 pins 27 and 28 should be set up using the I2CPADCFG register if they are used for an I
2
C-bus. Bits
27 and 28 of PINMODE_OD0 do not have any affect on these pins, they are special open drain I
2
C-bus
compatible pins.
[3] Port 0 bits 1:0, 11:10, and 20:19 may potentially be used for I
2
C-buses using standard port pins. If so, they
should be configured for open drain mode via the related bits in PINMODE_OD0.
8.5.17 Open Drain Pin Mode select register 1 (PINMODE_OD1 -
0x4002 C06C)
This register controls the open drain mode for Port 1 pins. For details see Section 8.4 “Pin
mode select register values”.
10 P0.10OD
[3]
Port 0 pin 10 open drain mode control, see P0.00OD 0
11 P0.11OD
[3]
Port 0 pin 11 open drain mode control, see P0.00OD 0
14:12 - Reserved. NA
15 P0.15OD Port 0 pin 15 open drain mode control, see P0.00OD 0
16 P0.16OD Port 0 pin 16 open drain mode control, see P0.00OD 0
17 P0.17OD Port 0 pin 17 open drain mode control, see P0.00OD 0
18 P0.18OD Port 0 pin 18 open drain mode control, see P0.00OD 0
19 P0.19OD
[3]
Port 0 pin 19 open drain mode control, see P0.00OD 0
20 P0.20OD
[3]
Port 0 pin 20open drain mode control, see P0.00OD 0
21 P0.21OD Port 0 pin 21 open drain mode control, see P0.00OD 0
22 P0.22OD Port 0 pin 22 open drain mode control, see P0.00OD 0
23 P0.23OD Port 0 pin 23 open drain mode control, see P0.00OD 0
24 P0.24OD Port 0 pin 24open drain mode control, see P0.00OD 0
25 P0.25OD Port 0 pin 25 open drain mode control, see P0.00OD 0
26 P0.26OD Port 0 pin 26 open drain mode control, see P0.00OD 0
28:27 -
[2]
Reserved. NA
29 P0.29OD Port 0 pin 29 open drain mode control, see P0.00OD 0
30 P0.30OD Port 0 pin 30 open drain mode control, see P0.00OD 0
31 - Reserved. NA
Table 94. Open Drain Pin Mode select register 0 (PINMODE_OD0 - address 0x4002 C068) bit
description …continued
PINMODE
_OD0
Symbol Value Description Reset
value
Table 95. Open Drain Pin Mode select register 1 (PINMODE_OD1 - address 0x4002 C06C) bit
description
PINMODE
_OD1
Symbol Value Description Reset
value
0 P1.00OD Port 1 pin 0 open drain mode control. 0
0 P1.0 pin is in the normal (not open drain) mode.
1 P1.0 pin is in the open drain mode.
1 P1.01OD Port 1 pin 1 open drain mode control, see P1.00OD 0
3:2 - Reserved. NA
4 P1.04OD Port 1 pin 4 open drain mode control, see P1.00OD 0