UR5HCSPI View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'UR5HCSPI' PDF : 20 Pages View PDF
FUNCTIONAL DESCRIPTION
The UR5HCSPI 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.
PIN DEFINITIONS
Mnemonic
VCC
VSS
VX
OSCI
OSCO
_RESET
MISO
MOSI
SCK
_SS
_IOTEST
_WKU
R0-R4
R5-R7
C0-C5
C6-C7
C8-C9
C10/WUKO
C11/_LID
LED2
LED1
LED0
XSW
SWO
_ATN
_PWR_OK
NC
NC0
PLCC
44
22
4
43
42
1
QFP
38
17
43
37
36
41
34
35
36
37
24
2
13-17
19-21
12-7
6-5
31-30
29
30
31
32
18
42
8-12
13-15
7-2
1,44
26-25
29
24
28
23
27
21
26
20
25
19
33
28
32
27
38
39
3,18
23,40
41
33
34
39-40
16,22
35
Type Name and Function
Power Supply: 3-5V
I Ground
I Tie to VCC
I Oscillator input
O Oscillator output
I Reset: apply 0V to provide orderly
start-up
O SPI Interface Signals
I
I
I Slave Select: If not used tie to VSS
O Wake-Up Control Signals
I
I Row Data Inputs
I Port provides internal pull-up resistors
O Column Select Outputs:
O
O
Multi-function pins
I/O C10 & “Wake-Up Keys Only” imput
I/O C11 & Lid latch detect input
Miscellaneous functions
I/O LED2 output
I/O LED1 output
I/O LED0 output
I External discrete switch
I Discrete switch
Power Management Pins
O CPU Attention Output
I Power OK Input
No Connects: these pins are unused
NC0 should be tied to VSS or GND
Note 1: An underscore before a pin mnemonic denotes an active low signal.
Copyright Semtech 1997-2001
3
DOC5-SPI-DS-117
www.semtech.com
Share Link: 
