UIC680 Programmer’s Manual
UDN PM063-U Rev. 4
3-4
3.6 Communication
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RS232 Interface Data Output
Synchronization
The interface receives and transmits serial asynchronous data at voltage levels
compatible with the RS232 specification.
Baud Rate
9600 BPS default (optional: 1200/2400/4800/9600/19200/38400/56000/115.2K BPS)
•
RS232 Interface Pass Through
Baud Rate
9600 BPS default (optional: 1200/2400/4800/9600/19200/38400 BPS)
•
USB Interface
Compatible with USB specification 1.1
•
F2F TTL Interface (Optional)
Each track has the clock and data. Please refer to command set for the detail setting.
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Transmission Protocol
The user may select from three different protocols: Protocol 0, 1, and 2.
Upon reset, the reader sends the power-on response “:”, depending upon the
configuration setting. The reader then configures itself to the protocol of the first
command from the host. From this point on, the protocol is unchangeable until a reset
occurs.
Protocol 0
In Protocol 0, all characters are transmitted and received using exactly the characters
listed in section 4. There are no headers and Block Check Characters (BCC). Protocol
0 presumes no transmission errors. If the host detects an error, it may request a
retransmission.
Table 3-5. Example for Protocol 0
Protocol 1
In Protocol 1, all messages are preceded by the ASCII character <STX> and
terminated with the ASCII character <ETX>, followed by a one byte <BCC>.
<BCC> is an XOR of the 7 data bits, excluding parity, of each character in the entire
message, including <STX>.
Format: <STX><MESSAGE><ETX><BCC>
Host Command Reader Response
Comment
P
Ready to read
^
Reader
ACK