Standard Emv Transaction - Magtek DynaPro Mini Programmer's Manual

3 - Command Set

3.6.3.1 Standard EMV Transaction

The sequence for calling the command is as follows:
1) As a cautionary measure, the host may send the device Command 0x02 - End Session to make sure
the device does not have a previous unfinished transaction lingering, which would block initiation of
a new transaction.
2) The host finalizes the amount for the transaction.
3) The host sends the device Command 0xA2 - Start EMV Transaction.
4) The device prompts the cardholder to present payment by displaying pre-defined EMV messages:
a) DynaPro Mini cycles between showing
ENTER , and waits for the cardholder to select
5) If the cardholder confirms the amount or makes a payment type selection, then depending on the card
type the host specified in the command, the device arms the MSR and/or ICC slot, turns on the LED
near the slot (if any), and displays either
button or the transaction times out, the device performs Command 0xA2 Completion.
Cancel
6) If the cardholder swipes a magnetic stripe card, the device meets EMV 4.x requirements by checking
the service code from the magnetic stripe data to see if it begins with a 2 or a 6 to determine if the
card also includes a chip, and advises the cardholder that EMV is preferred by displaying
READER (similar to the screenshots for Command 0x07 - Display Message). If the chip fails or the
service code does not begin with a 2 or a 6, the device prompts the cardholder for an MSR swipe.
After a successful swipe, the device prompts the cardholder to select
debit account type, the device requests a PIN.
7) If the cardholder inserts a contact chip card, depending on the device's payment brand account type
setting for ICC the Acquirer has set in tag DFDF73 [see Appendix D MagTek Custom EMV Tags
(EMV Only)] the device does one of the following:
a) Assume Credit, Debit, or Default.
b) Prompt the cardholder to select
8) If the cardholder has inserted a contact chip card, the device shows ICC applications that are mutually
supported by both the card and the device, and asks the cardholder to choose the preferred ICC
application. If there is no mutually supported application, the device may show
If a PIN entry is needed per EMV 4.x requirements, the device shows
entry timer (similar to the screenshots for Command 0x04 - Request PIN Entry). If the cardholder
cancels the transaction or the transaction times out, the device performs Command 0xA2
Completion. When the device is configured to allow PIN bypass using tag DFDF68, the PIN
requirement can be bypassed by the merchant by setting bit 0, byte 6 of the 0xA2 command. The
TVR bits will be set appropriately per EMV 4.x requirements. The PIN requirement can also be
bypassed by the cardholder.
9) After PIN entry, the device displays either
AGAIN up to the PIN retry limit (similar to the screenshots in Command 0x04 - Request PIN
Entry). If the number of attempts reaches PIN try limit-1, the device displays
before returning to
TRY AGAIN
performs Command 0xA2 Completion, otherwise the transaction proceeds to the approval stage.
10) The device determines the appropriate transaction approval method per EMV 4.x requirements. A
transaction can be forced online by the merchant by setting the Options in the invocation of
Command 0xA2 to Force Online.
a) For offline transactions, the device gets the TC or AAC from the chip for later transmission to the
host. Depending on the transaction outcome, the device shows
DynaPro Mini| PIN Encryption Device | Programmer's Manual (Commands)
,
(AMOUNT)
Enter
or
SWIPE INSERT CARD
, , or
Credit Default
or cycles through
PIN OK
. If the cardholder exceeds the PIN entry retry limit, the device
Page 73 of 128 (D99875629-43)
and
(AMOUNT) OK? CANCEL OR
or Cancel .
. If the cardholder presses the
Debit or Credit
.
Debit
CARD BLOCKED
ENTER PIN
INCORRECT PIN
Last PIN Try
APPROVED
USE CHIP
. If this is a
.
and starts the PIN
and
TRY
briefly
, DECLINED , or