User's Manual

Table Of Contents
ACGPass e-ID Desktop Reader, Ver. Dual ISO 2.3
8 Software for contactless interface functions
By default, data is transmitted at 9600, n, 8, 1, no handshaking. Two protocol modes
are supported. The protocol mode is configured in the reader EEPROM. As factory
default, the ASCII protocol is used.
If the PC/SC driver has been installed on the host PC, then the commands of this
chapter can’t be used as such. Only the PC/SC specification is valid in this case. The
reader also can be installed with the standard USB driver. The driver can be
downloaded from http://www.aaitg.com. This driver enables the usage of a virtual
COM port on the host PC. Then all commands mentioned below can be used.
8.1 ASCII Protocol
This protocol is designed for easy handling. The commands are issued using a
terminal program. Data is transmitted as ASCII hexadecimal that can be displayed on
any terminal program (i.e. HyperTerminal).
Command Data
Variable length Variable length
Figure 8-1: ASCII protocol frame
8.2 Binary Protocol
This protocol is designed for industrial applications with synchronization and frame
checking. An addressing byte for party line (master/slave, multi-drop) is also
included.
The protocol usually requires a device driver. Data is transmitted in binary mode. The
reader uses an internal binary watchdog timer to ensure correct framing.
STX Station ID Length Data BCC ETX
1 byte 1 byte 1 byte Variable length 1 byte 1 byte
Figure 8-2: Binary Frame Version 1
The binary frame version 2 is only sent to the host. It is implemented to give
extended information to the host.
Version 2 must be enabled in the Protocol configuration 2 register.
STX Station ID Length Flags Data BCC ETX
1 byte 1 byte 1 byte 1 byte Variable length 1 byte 1 byte
Figure 8-3: Binary Frame Version 2
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