pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 52

• Manufacturer Part Number: pc87591l
• Description: Lpc Mobile Embedded Controllers
• Manufacturer: National Semiconductor Corporation

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2.0 Signal/Pin Description and Configuration
2.2.15 Internal Pull-Up and Pull-Down Resistors
The signals listed in Table 5 can optionally support internal pull-up (PU) and/or pull-down (PD) resistors. See Section 7.3 on
page 377 for the values of each resistor type.
SCL2-1
SDA2-1
IOPA7-0
IOPB7-0
IOPC7-0
IOPD7-4
IOPD3-0
IOPE7,6,4
IOPF7-0
KBSIN7-0
PSCLK4-1
PSDAT4-1
BADDR1-0
ENV1-0
TRIS
SHBM
1. Active only during V
Signal
Table 5. Internal Pull-Up and Pull-Down Resistors
125,
121
126,
122
33-26
123, 6-5,
122,121,120,
114-113
3-1,128-125 3,176-175,
N/A
25-21
21-20, 4
89-82
60-53
88, 86,
84, 82
89, 87,
85, 83
95-94
93-92
96
97
128-Pin
LQFP
General-Purpose I/O (GPIO) Ports
CC
Internal Keyboard Scan (KBC)
Power-Up reset.
Strap Configuration
ACCESS.bus (ACB)
169,
163
170,
164
43, 40-36,
33-32
165, 6-5,
164-163,
120,114-113
172-169
55-54, 42-
41
31-30, 29,
26
25-24, 2
119-114,
111-110
80-77, 74-
71
118,116,
114,110
119,117,
115,111
127-126
125-124
128
131
176-Pin
PS/2 Interface
LQFP
52
(Continued)
Type
PU
PU
PU
PU
PU
PU
PU
PU
PU
PU
PU
PD
PD
PD
PD
80
80
80
80
80
80
80
80
80
80
80
80
80
80
80
Programmable
Programmable
Programmable
Programmable
Programmable
Programmable
Programmable
Programmable
Programmable
Programmable
Programmable
Strap
Strap
Strap
Strap
1
1
1
1
Comments
Revision 1.07