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NEO 2 Interface Developer’s Guide
Copyright © 2019, International Technologies & Systems Corporation. All rights reserved.
51
The response frame is returned asynchronously if the reader is in auto poll.
After auto-switch is invoked the reader remains in Pass-Through Mode with the RF antenna
on. The POS application must handle error recovery and exit Pass-Through Mode when done
with the
Pass-Through Mode Start/Stop
command (2C-01). The reader returns to previous
polling mode or idle state.
To enable global auto-switch, send the
Set Configurable AID
command (04-02) with a 01h
value for the DF7C TLV.
3.2.6.
RF On/Off States for Pass-through Commands
Sending a Stop Pass-through command will turn off the RF Antenna. Otherwise, the antenna
is under the direct control of the POS/Terminal in Pass-through mode.
3.3.
Burst Mode
In Burst Mode (which requires auto poll mode to be set first, and is useful only for MSR data;
see note below), a data frame is sent from the ViVOpay reader to the terminal each time a card
is read successfully. The ViVOpay keeps polling for the supported RF cards. Whenever the
ViVOpay reader detects a card in the RF field, it tries to read the card data.
If the read operation is successful, the ViVOpay reader sends a “card payload” frame that
contains the status, application type, card data and CRC to the terminal through its serial port.
Detailed information on the frame format is given in the sections ahead. The terminal does not
have to send any command or data to the ViVOpay reader.
Note:
The reader must be in auto poll mode for Burst Mode to be used successfully. setting
Burst Mode on for other configurations can lead to unexpected results.
Burst Mode is intended to be used with magnetic stripe card data only.
Burst Mode is enabled using the
Set Configuration
command and the FFF7 tag. There are two
options for Burst Mode:
Always On
(FFF7 = 01) and
Auto Exit
(FFF7 = 02). When the reader is
in
Burst Mode Always On
, it ignores
Activate Transaction
and
Get Full Track Data
commands
and remains in Burst Mode. When
Burst Mode Auto Exit
is enabled, the reader ends Burst
Mode (FFF7 = 00) and processes these commands. Burst Mode then remains off until it is
reactivated with a new
Set Configuration
command with tag FFF7 set to 01 or 02.
When the Burst Mode is enabled, the standard ViVOpay serial interface is not disabled entirely.
Commands not related to transactions, such as
Ping
, can still be sent to the ViVOpay reader. In
the command-response mode, the terminal sends a command to the ViVOpay reader and the
ViVOpay reader responds in a pre-defined manner. These commands allow a terminal to use
features provided by the ViVOpay reader, such as checking for the presence of the ViVOpay
reader by pinging it, or retrieving the firmware version number.