UR5HCSPI-06-FN View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'UR5HCSPI-06-FN' PDF : 20 Pages View PDF
KEY CODES
Key codes range from 01H to 73H
and are arranged as follows:
Make code = column_number * 8 +
row_number + 1
GIO0 PIN
The UR5HCSPI-06 a general purpose pin that can be programmed as Input,
Output, Debounced or Switch Input. The programmable I/O pin can be
configured to the desired mode through a command from the system. After
the I/O pin is configured, the host system can read or write data to it. If the
pin is configured as a Debounced Switch, it will return scan codes.
Break code = Make code OR 80H
Input Mode
Discrete Switches transmit the
following codes:
While in the Input Mode, the GIO0 pin will detect input signals and report
the input status to the system as required.
XSW = 71H
Output Mode
SW0 = 72H
GIO0 = 73H
In the Output Mode, the UR5HCSPI-06 will control the output signal level
according to the system command. When the pin is set at Output Mode,
the default output is low.
Switch Input Mode
Pin Configurations
When prototyping, caution should
be taken to ensure that
programming of the GIO0 pin does
not conflict with the circuit
implemented. A series protection
resistor is recommended to be used
for protection over improper
programming of the pin.
After a power-on or soft reset, GIO0
defaults to the Input state.
The drawing to the right illustrates
the suggested interface to the
general purpose input/output pin.
In Switch Input Mode, the UR5HCSPI-06 will generate an individual make
key code when the switch closes (pin goes low), and a break key code
when the switch returns to open (pin goes to high). The switches generate
key codes outside of those generated by the key matrix, from 71H - 73H.
When the switch closes, the SPICoderTM will not fall asleep.
Input
Output
GIX
LED
Circuit
determined by
the specific
application
Series
protection
resistor
GIX
Switch
_WKU
_IOTEST
Circuit
determined by
the specific
application
150K
15K
GIX
GIX
Wake-up
interrupt
i
Figure 3: The suggested interface to the general purpose
input/output pin
Copyright Semtech 1997-2001
8
DOC5-SPI-06-DS-103
www.semtech.com
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