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UR5HCSPI-06 Datasheet (HTML) - Semtech Corporation

Part No. UR5HCSPI-06
Description  Zero-PowerTM Keyboard Encoder & Power Management IC for H/PCs
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Maker  SEMTECH [Semtech Corporation]
Homepage  http://www.semtech.com
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FUNCTIONAL DESCRIPTION
PIN DEFINITIONS
Copyright Semtech 1997-2001
DOC5-SPI-06-DS-103
www.semtech.com
3
The UR5HCSPI-06 consists
functionally of five major sections
(see the Functional Diagram on
page 2). These are the Keyboard
Scanner and State control, the
Programmable I/O, the SPI
Communication Channel, the
System Monitor and the Power
Management unit. All sections
communicate with each other and
operate concurrently.
Mnemonic
PLCC
QFP
Type
Name and Function
VCC
44
38
I
Power Supply: 3-5V
VSS
22
17
I
Ground
VX
4
43
I
Tie to VCC
OSCI
43
37
I
Oscillator input
OSCO
42
36
O
Oscillator output
_RESET
1
41
I
Reset: apply 0V to provide orderly
start-up
MISO
34
29
O
SPI Interface Signals
MOSI
35
30
I
SCK
36
31
I
_SS
37
32
I
Slave Select: If not used tie to VSS
_IOTEST
24
18
O
Wake-Up Control Signals
_WKU
2
42
I
R0-R4
13-17
8-12
I
Row Data Inputs
R5-R7
19-21
13-15
I
Port provides internal pull-up resistors
C0-C5
12-7
7-2
O
Column Select Outputs:
C6-C7
6-5
1,44
O
C8-C9
31-30
26-25
O
Multi-function pins
C10
29
24
I/O C10 & “Wake-Up Keys Only” imput
C11/_LID
28
23
I/O C11 & Lid latch detect input
Miscellaneous functions
C12
27
21
I/O C12
C13
26
20
I/O C13
GIO0
25
19
I/O Programmable I/O
WUKO
33
28
I
External discrete switch
SWO
32
27
I
Discrete switch
Power Management Pins
_ATN
38
33
O
CPU Attention Output
_PWR_OK
39
34
I
Power OK Input
NC
3,18
39-40
No Connects: these pins are unused
23,40
16,22
NC0
41
35
NC0 should be tied to VSS or GND
Note 1: An underscore before a pin mnemonic denotes an active low signal.



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