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There are two different types of Mifare cards, the VP-II X automatically detects the card type based on
the different types of keys used to access the card. Card type can be recognized by checking the blank
values, which are FF or AB. If you are unsure, use the Check function to get the information. The Check
function is available only when a reader module is installed.
Cache Mode (HID)
If the Cache Mode is enabled, VP-II X shall cache the User data once read from a card into its internal
memory for a quicker reading operation for future use.
DB Dependence
When a smart card User is enrolled, the UID (Unique Identifier) number of a card is stored in the VP-II X
database for management purpose. UID numbers of the enrolled Users are replicated to all VP-II X units
in the network.
If this option is selected, a smart card that the UID number is not registered in the VP-II X database will
not be accepted even though the card contains the vascular data issued by another VP-II X system.
If not selected, VP-II X will accept cards without checking a UID from the database.
Customer Key Setting
The VP-II X uses a key to encrypt the data stored in a smart card. For security reasons, customers
should assign a unique key to be utilized for their VP-II X devices. The key is stored in both VP-II X and
the card, and the key in the card must be matched to that in the VP-II X to be accepted. This prevents
unauthorized cards such as one issued by another customer from being accepted at the site.
UID Order (Mifare)
The VP-II X generates the Wiegand data of Mifare cards with its UID. There are two types: MSB (Most
Significant Bit) and LSB (Least Significant Bit). The VP-II X is set to MSB by default. The example below
shows how to generate Wiegand data when MSB is selected.
The following table shows how VP-II X sends a Wiegand data by using different Mifare cards types and
how VP-II X generates Wiegand data with MSB option.
Mifare Card UID Maximum Bit(include parity bit)
1K/4K 4 byte (32bits) 34 bits
DESFire 7 byte (56 bit) 58 bits
UID Hex: [12H][34H][56H][78H]
Even Parity 12H 34H 56H 78H Odd Parity
1 0001 0010 0011 0100 0101 0110 0111 1000 1
If a Manager wants to change the UID order after enrolling with a different order, the cards previously
enrolled must be re-enrolled to get the correct format of Wiegand data.
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