V4070 EM Microelectronic, V4070 Datasheet - Page 4

• Manufacturer Part Number: V4070
• Description: Crypto Contactless Identification Device
• Manufacturer: EM Microelectronic

Block Diagram
Pad Description
Coil 1
Coil 2
Pad
1
3
4
5
6
7
8
C r
8
1
COIL2
COIL1
Name
TST1
TST2
TST3
VDD
VSS
Extractor
Extractor
EM MICROELECTRONIC-MARIN SA
converter
Clock
Data
AC/DC
GND
+V
Description
Coil Terminal 2
Negative DC Supply
Test 1 connection
Test 2 connection
Test 3 connection
Positive DC Supply
Coil Terminal 1
Modulator
C s
7
6
5
4
3
Sequencer
Command
Decoder
Encoder
Control
Power
Functional Description
General
The V4070 is supplied by means of an electromag-
netic field induced on the attached coil. The AC volt-
age is rectified in order to provide a DC internal supply
voltage. When the DC voltage crosses the Power-On
level, the chip will enter the Standby Mode and expect
commands. In Standby Mode a continuous sequence
of Listen Windows (LIW) is generated. During this time,
the crypto-Chip will turn to the Receive Mode (RM) if it
receives a valid RM pattern. The chip then expects a
command to enter the desired mode of operation.
Memory Organisation
The 160 bits EEPROM are organised in 10 words of
16 bits. Words 0 and 1 contain the USER_MEMORY
and the Lock-Bits LB1 and LB0. Write-Mode can only
be entered if LB1=’1' and LB0=’0'. Words 2 and 3 con-
tain the ID that can never be modified. Words 4 through
9 contain the 96 bits of secret key. These bits influ-
ence the crypto-algorithm but cannot be read directly.
Write Enable
Serial Data
Reset
Control
Logic
EEPROM
V4070
Crypto-
Algorithm
Figure 4
4