pc87591l-n05 National Semiconductor Corporation, pc87591l-n05 Datasheet - Page 45

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

Revision 1.2
2.0 Signal/Pin Description and Configuration
2.2.10 PS/2 Interface
2.2.11 Strap Configuration and Testing
BADDR1-0 127-126
ENV1-0
SHBM
TRIS
XOR_OUT 68
PSCLK4-1
PSDAT4-1
Signal
Signal
125-124
131
128
118, 116,
114, 110
119, 117,
115, 111
Pin(s)
LQFP
Pin(s)
LQFP
E15, C13
D12, F15
C14
D14
P8
E13, G14,
F13, H13
G15, F12,
H15, G13
Ball(s)
FBGA
Ball(s)
FBGA
I/O
I/O IN
I/O IN
I/O
O
I
I
I
I
Buffer
Buffer
Type
Type
T
T
IN
IN
IN
IN
O
/O
/O
4/8
CS
CS
CS
CS
2/12
2/12
45
Power
Power
Well
V
V
V
V
V
Well
V
V
CC
CC
CC
CC
CC
(Continued)
CC
CC
I/O Base Address. Sampled at V
reset to determine the base address of the
configuration Index-Data register pair as follows:
Environment Select 1 and 0. Sampled at V
Power-Up reset to determine the device operation
environment, IRE, OBD or DEV. Each pin is pulled
to 0 (set environment to IRE = 00) by an internal
resistor or set to 1 by an external 10 K
resistor.
For further details refer to Section 2.3 on page 48.
Shared Host BIOS Memory. Sampled at V
Power-Up reset to determine the state of the shared
Host BIOS memory. Pulled to 0 (disables the shared
host BIOS memory) by an internal resistor or set to
1 by an external 10 K
the shared BIOS mode.
TRI-STATE. Forces the device to float all its output
and I/O pins (except for DAC outputs and 32KX2) if
an 10 K
Sampled at V
XOR Tree Output. All the device pins (except
power type and analog type pins) are internally
connected in a XOR tree structure.
PS/2 Channel 1 through 4 Clock signal.
PS/2 Channel 1 through 4 Data signal.
No pull-up resistor:
10 K
10 K
10 K
resistor on BADDR0: 4E
resistor on BADDR1: Core defined
BADDR0 and BADDR1: XOR Tree Test Mode.
When selecting this mode TRIS must be 0 (left
unconnected).
external pull-up
external pull-up
external pull-up resistor on
external pull-up resistor is connected.
CC
Power-Up reset.
Description
Description
pull-up resistor to enable
2E
16
16
-2F
-4F
CC
16
16
Power-Up
www.national.com
pull-up
CC
CC