pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 45

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

Revision 1.07
2.0 Signal/Pin Description and Configuration
2.2.6
General-Purpose I/O (GPIO) and Internal Keyboard Scan
KBSIN7-0
KBSOUT15-0 52-37
Signal
60-53
128-Pin
LQFP
80-77,
74-71
68-64,
61-56,
53-49
176-Pin
LQFP
I/O
O
I
IN
Buffer
CS
Type
OD
/IN
6
AC
Power
Well
V
V
45
CC
CC
Keyboard Scan Inputs. The input side of the
internal keyboard scan lines. These inputs may
be configured to work with either Schmitt trigger
inputs, for operation with switch based
keyboards, or with internal analog voltage
comparators to interface to a resistive keyboard
matrix. KBSIN7-0 are referenced to V
are designed to work using a 3.3V supply. See
Section 4.14 on page 208 for more details.
Keyboard Scan Outputs. The output side of
the internal keyboard scan lines.
(Continued)
Description
CC
and
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