pc87591l-n05 National Semiconductor Corporation, pc87591l-n05 Datasheet - Page 118

• Manufacturer Part Number: pc87591l-n05
• Description: Lpc Mobile Embedded Controller
• Manufacturer: National Semiconductor Corporation

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4.0 Embedded Controller Modules
Port Weak Pull-Up Registers (PxWPU, PyWPU)
These registers control the pull-up for the related pin, when it used either as GPIO or in its alternate function. The pull-up is
enabled when the corresponding bit of PxWPU or PyWPU is set and the port buffer is in TRI-STATE. Otherwise, the pull-up
is disabled (i.e., high impedance).
On reset, PxWPU or PyWPU is cleared (0), disabling all pull-ups.
Location: See Appendix A
Type:
Bit
Name
Reset
Bit
Name
Reset
R/W
7
0
7
0
6
0
6
0
5
0
5
0
(Continued)
Px Port Weak Pull-Up Enable
Py Port Weak Pull-Up Enable
118
4
0
4
0
3
0
3
0
2
0
2
0
1
0
1
0
0
0
0
0
Revision 1.2