Communication Timing; Default Settings; General Selections - IDTECH SecureHead User Manual

User Manual, SecureHead USB and UART Interface
Where:
<STX> 02h
<S> Indicates setting commands. 53h
<R> Indicates read status commands. 52h
<FuncID> One byte Function ID identifies the
particular function or settings affected.
<Len> One byte length count for the following data
block<FuncData>
<FuncData> data block for the function
<ETX> 03h
<CheckSum> Check Sum: The overall Modulo 2
(Exclusive OR) sum (from <STX> to
<CheckSum>) should be zero.
<ACK> 06h
<NAK> 15h

3.2. Communication Timing

The SecureHead takes time to process a command. During that processing time, it will not respond to a
new command.
The typical delay for the reader to respond to a command is 20ms, the maximum delay for the reader to
respond can be as much as 40ms. Caution must therefore be taken to maintain a minimum delay
between two commands.

3.3. Default Settings

The SecureHead reader is shipped from the factory with the default settings already programmed. In
the following sections, the default settings are shown in boldface.
For a table of default settings, see Appendix A.

3.4. General Selections

This group of configuration settings defines the basic operating parameters of SecureHead.
3.4.1. Change to Default Settings
<STX><S><18h><ETX><CheckSum>
This command does not have any <FuncData>. It returns all settings for all groups to their default
values.
3.4.2. MSR Reading Settings
Enable or Disable the SecureHead. If the reader is disabled, no data will be sent out to the host.
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