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UR5HCSPI-FB Datasheet (HTML) - Semtech Corporation

Part No. UR5HCSPI-FB
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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COMMANDS FROM THE HOST TO THE UR5HCSPI
Copyright Semtech 1997-2001
DOC5-SPI-DS-117
www.semtech.com
13
Commands from the Host - Summary
Command Name
Code
Description
Initialize
AOH
Causes the UR5HCSPI to enter the power-on state
Initialization Complete
A1H
Issued as a response to the “Initialize Request”
Heartbeat Request
A2H
The UR5HCSPI will respond with “Heartbeat Response”
Identification Request
F2H
The UR5HCSPI will respond with “Identification Response”
LED Status Request
A3H
The UR5HCSPI will respond with “LED Status Response”
LED Modify
A6H
The UR5HCSPI will change the LED accordingly
Resend Request
A5H
Issued upon error during the reception of a packet
Input/Output Mode Modify
A7H
The UR5HCSPI will modify or report the status of the GIO0 pin
Output Data to I/O pin
A8H
The UR5HCSPI will output a signal to the GIO0 pin
Set Wake-Up Keys
A9H
Defines which keys are “wake-up” keys
Each command to UR5HCSPI is composed of a sequence of codes. All commands start with <ESC> code (1BH)
and end with the LRC code (bitwise exclusive OR of all bytes).
Initialize
<ESC>
1BH
<INIT>
A0H
<LRC>
7BH
When the UR5HCSPI receives this command, it will clear all buffers and return to the power-on state.
Initialization Complete
<ESC>
1BH
<INIT COMPLETE>
A1H
<LRC>
7AH
When the UR5HCSPI receives this command, it will enable transmission of keyboard data. Keyboard data
transmission is disabled if the TX output buffer is full (32 bytes). Note that if the transmit data buffer gets full the
encoder will issue an "Initialize Request" to the host.
Heartbeat Request
<ESC>
1BH
<ONLINE>
A2H
<LRC>
79H
When the UR5HCSPI receives this command, it will reply with the Heartbeat Response Report.
Identification Request
<ESC>
1BH
<ID>
F2H
<LRC>
29H
The UR5HCSPI will reply to this command with the Identification Response Report.
COMMANDS FROM THE HOST TO THE UR5HCSPI ANALYTICALLY



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