EM EM4169A6WS7 128 bit read/write contactless identification device with otp function Datasheet

EM4069
EM4169
EM MICROELECTRONIC - MARIN SA
128 bit Read/Write Contactless Identification Device
with OTP function
Description
Features
EM4069 (previously named P4069) is a CMOS integrated
circuit intended for use in electronic Read/Write RF
transponders, with an optional lock function to disable
EEPROM write operations.
The IC is powered by picking the energy from a
continuous 125 kHz magnetic field via an external coil,
which together with the integrated capacitor form a
resonant circuit. The IC read out data’s from its internal
EEPROM or ROM and sends it out by switching on and
off a resistive load in parallel to the coil. Commands and
EEPROM data updates can be executed by AM
modulation of the 125 kHz magnetic field.
At power–up the EM4069 goes in default mode in which it
constantly (without any pause) transmits 128 bits from the
EEPROM. Upon transmission of a specific command, the
64 bits unique laser code is output. Additional commands
for writing and lock data in EEPROM are available.
The EM4169 (previously named P4169) is the same
device but with large bumps (mega pads) as indicated on
page 13 of this data sheet. All specified parameters and
descriptions are applicable for the EM4169 device.
128 bit EEPROM organized in 8 words of 16 bits
64 bit fixed code memory array laser programmed
OTP feature convert EEPROM words in read only
Power on Reset sequence
Power-check for EEPROM write operation
Data
transmission
performed
by
Amplitude
Modulation (IC to reader and reader to IC)
Data encoding : Manchester or BI-Phase (FDX-B)
Transmission reader to chip: typically 65% AM
modulation
Data rate : 64 or 32 RF field periods per bit
(2 kBaud or 4 kBaud at 125 kHz)
78 pF resonant capacitor integrated on chip
100 to 150 kHz frequency range
On-chip rectifier and voltage limiter
No external supply buffer capacitor needed
-40 to +85°C temperature range
Very low Power consumption
Applications
Typical Operating Configuration
Access Control
Animal Identification
Material Logistics
Pin Assignment
VSS
VSS
EM4069
L
EM4069
C1
C1
Typical value for inductance L is 20.7mH at fO = 125KHz
Fig. 2
Fig. 1
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EM4069
EM4169
Absolute Maximum Ratings
Handling Procedures
VSS = 0V
Parameter
Power supply
Input Voltage (pads TST,
TCP, TIO)
Symbol
Conditions
VDD
-0.3 to +5.5V
VPIN
Input current on COIL1
ICOIL1
Input voltage on COIL1
VCOIL1
Storage temperature
Electrostatic discharge to
MIL-STD-883C method 3015
TSTORE
VESD
This device has built-in protection against high static
voltages or electric fields. However due to the unique
properties of this device, anti-static precautions should
be taken as for any other CMOS component. Unless
otherwise specified, proper operation can only occur
when all terminal voltages are kept within the supply
voltage range.
- 0.3 to
VDD+0.3V
-30 to
+30mA
Operating Conditions VSS = 0V
-10 to +10V
Parameter
Operating temperature
AC voltage on coil 1
Maximum coil current
Frequency on coil 1
-55 to
+125°C
1000V
Symbol
TOP
VCOIL1
ICOIL1
FCOIL1
Min.
-40
-10
100
Typ.
+25
*
125
Max. Units
+85
°C
Vpp
10
mA
150
kHz
*) Maximum voltage is defined by forcing 10mA on
Coil1 – Vss
Stresses above these listed maximum ratings may cause
permanent damage to the device. Exposure beyond
specified electrical characteristics may affect device
reliability or cause malfunction.
Electrical parameters and functionality are
guaranteed when the circuit is exposed to light.
not
Electrical Characteristics
Unless otherwise specified: VDD= 1.0V to 5.5V, TA=-40 to +125°C.
Parameter
Regulated Supply Voltage
Reg. Voltage reading EEPROM (note 3)
Supply current in read mode
Reg. Voltage writing EEPROM
Supply current write mode
Power Check Voltage
Modulator ON voltage drop
Modulator ON voltage drop
POR level
Clock extractor
Peak detector threshold.
Peak detector hysteresis
Resonance capacitor (note 1)
EEPROM data retention (note 2)
EEPROM write cycles
Note 1:
Note 2:
Note 3:
Symbol
VDD
VRD
IRD
VWR
IWR
VPC
Von1
Von2
VPOR
VCOIL1
Vpd
Vpdh
CR
TRET
NCY
Condition
ICOIL1 = 10mA
Min.
3.0
2.0
Typ.
3.5
Max.
4.0
3.8
5,5
50
2.8
1.45
3.6
1.85
100
3.15
1.75
4.5
2.20
4
100
78
4.6
200
2.5
VDD = 3.5 V
ICOIL1 = ±100µA
ICOIL1 = ±1 mA
Rising edge
VDD = 3.3 V
VDD = 3.3 V
32 kHz, 0.3Vpp
TOP = 55°C
VDD = 3.6 V
2.4
1.2
3
1.5
0.5
3.2
20
10
100000
Units
V
V
µA
V
µA
V
V
V
V
VPP
VPP
mV
pF
years
cycles
Value of the resonance capacitor may vary in limits of ± 12%
Statistics show a variation of capacitance within one lot of ± 5%.
These figures are given as information only.
Based on 1000 hours at 150°C.
VRD must be higher than VPOR Level.
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EM4069
EM4169
Timing Characteristics
VDD = 3.0 V, VSS = 0 V, fCOIL1 = 125 kHz square wave, VCOIL1 = 5V, TOP = 25°C, unless otherwise specified
Parameter
Option : 64 RF periods per bit
Symbol
Condition
Min.
Read bit period
EEPROM write time
Synchronization pattern phase 1
Synchronization pattern phase 2
Synchronization pattern phase 3
tRDB
tWee
tS1
tS2
tS3
20
4.1
1.5
1.5
Option : 32 RF periods per bit
Read bit period
EEPROM write time
Synchronization pattern phase 1
Synchronization pattern phase 2
Synchronization pattern phase 3
tRDB
tWee
tS1
tS2
tS3
20
2.1
0.8
0.8
Typ.
Max.
Unit
5.0
2.0
4.0
RF periods
ms
ms
ms
ms
2.5
1.0
2.0
RF periods
ms
ms
ms
ms
64
32
RF periods represent periods of the carrier frequency emitted by the transceiver unit.
See figure 12 for Synchronization pattern phases.
Due to amplitude modulation of the coil-signal, the clock-extractor may miss clocks or add spurious clocks close to
the edges of the RF-envelope. This desynchronization will not be larger than ± 3 clocks per bit and must be taken into
account when developing reader software.
Block Diagram
Clock
Extractor
Sequencer
EEPROM
Data
Extractor
Control
Logic
Modulator
VDD
COIL1
CR
Power
Supply
Cbuf
VSS
ROM
Power on
Reset
Reset
VSS
Fig. 3
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EM4069
EM4169
Functional Description
The IC builds its power supply through an integrated
rectifier. When it is placed in a magnetic field the DC
internal voltage starts to increase.
As long the power supply is lower than the power on reset
(POR) threshold, the circuit is in reset mode to prevent
unreliable operation. In this mode the modulator switch is
off.
After the supply voltage cross the POR threshold, the
circuit goes in read mode and transmits periodically the
128 data bits from EEPROM.
The power on reset is designed with a typically 250mV
hysteresis. The specified value in the DC electrical
characteristic table indicates the high level-switching
threshold. Ones the supply voltage had reached this level,
the device work in read mode and reenter in reset mode if
the supply voltage decrease under the lower threshold
(~VPOR – 250mV).
In read mode the IC transmits periodically either the 128
data bits from EEPROM or 64 data bits from ROM if
command 2 has been sent. The bits are Manchester or BIphase coded and issued by switching the modulator load in
parallel to the coil ON and OFF. The read out process is
repeated continuously without any pause as long as power
level is greater than the POR threshold low.
While the IC is operating in read mode it checks the coil
signal once every bit period. If it detects a certain reader
induced amplitude modulation of magnetic field it stops
modulating and waits for a command word. In the case the
EEPROM write command is detected the contents of
selected EEPROM word is modified. Read ROM command
will change the output sequence to the data provided by
the laser ROM continuously.
The Reset command returns to the initial mode as after a
Power on Reset.
VDD
VPOR
t
Reset
P4069 Active
EM4069
Active
t
Fig. 4
Clock Extractor
The Clock extractor will generate a system clock with a
frequency corresponding to the frequency of the RF field.
The system clock is used by a sequencer to generate all
internal timings.
Data Extractor
The transceiver generated field will be amplitude
modulated to transmit data to the EM4069. The Data
extractor demodulates the incoming signal to generate
logic levels, and decodes the incoming data.
Modulator
The Data Modulator is driven by the serial data output from
the transceiver. The modulator will draw a large current
from both coil terminals, thus amplitude modulating the RF
field according to the selected memory data.
Block description
Power On Reset (POR)
When the EM4069 with its attached coil enters an
electromagnetic field, the built in AC/DC converter will
supply the chip. The DC voltage is monitored and a Reset
signal is generated to initialise the logic. The Power On
Reset is also provided in order to make sure that the chip
will start issuing correct data.
Hysteresis is provided to avoid improper operation at the
limit level.
Copyright  2003, EM Microelectronic-Marin SA
Hysteresis
AC/DC Converter and Voltage Limiter
The AC/DC converter is fully integrated on chip and will
extract the power from the incident RF field. The internal
DC voltage will be clamped to avoid high voltage in strong
RF fields.
Lock All / Lock Memory Area
The EM4069 can be converted to a Read Only chip or be
configured to Read/Write and Read Only Areas by
programming the protection word. This configuration can
be locked by write inhibiting the Write Protection Word.
Great care should be taken in doing this operation as there
is no further possibility to change the Write Protection
Word. The Control Word can also be protected in the
same way thus freezing the writing operation.
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EM4069
EM4169
EM4069 Modes of operation
The EM4069 additionally holds a unique 64 bit read only
identification code, which can be accessed by using the
Read ROM command.
IDLE
RF-field detected
Manchester encoding
One bit period lasts 64 (or 32) field frequency periods
(512 (or 256) µs at 125 kHz). The Manchester coding
shows a transition from ON to OFF or from OFF to ON in
the middle of bit period. At the transition from logic bit “1”
to logic bit “0” or logic bit “0” to logic bit “1” the phase
change. Value "high" of data stream presented below
represents modulator switch OFF, "low" represents
switch ON (see figure 6a).
INIT
Reset
Command
EEPROM Read Mode
Sync-Pattern
Command finished
Bi-phase encoding
One bit period lasts 64 (or 32) field frequency periods
(512 (or 256) µs at 125 kHz). The BI-phase coding shows
a transition from ON to OFF or from OFF to ON in the
middle of a bit period when the data bit is a logical “0”. A
logical bit set to “1” will keep its ON or OFF state for the
whole bit period. There is always a transition from ON to
OFF or from OFF to ON at the beginning of a bit period.
The picture below shows part of a data stream. Value
“high” of data stream represents modulator load OFF,
“low” represents modulator load ON (see figure 6b).
Command State
Fig. 5
Read Mode
The EM4069 holds 128 bits of user EEPROM. These 128
bits are cyclically read out by default. Using the write
command, the EEPROM words can be modified. The
EEPROM contains an additional configuration word used
to protect writing in the EEPROM
Manchester encoding
Binary data
X
1
1
1
1
1
1
1
1
1
0
1
0
1
0
0
0
1
1
0
Memory output
Modulator control
Modulation control “low” means high current
Fig. 6a
Bi-phase encoding
Binary data
0
1
1
0
1
0
0
1
Memory output
Modulator control
Modulation control “low” means high current
Fig. 6b
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EM4069
EM4169
EEPROM organization
The EEPROM is organized in 8 words of 16 bits. EEPROM words are counted from 0 to 7. Bits in an EEPROM word are counted
from 0 to 15. When EEPROM readout is initiated (after POR or after return from command to read mode) read out is started from
word 0 and increments to word 7. Readout in a word is started by bit 0 and then increments up to bit 15. After word 7 bit 15 is
read readout continues with word 0 bit 0 without any pause. So it is very important to organize data written in EEPROM in a way
that reader can detect the position of bits in data stream. For Manchester encoding Word 0 and word 4 are factory programmed
and locked (see figure 7a), for BI-phase encoding the 8 words are user free (see figure 7b and 7c). Following tables show how
standard versions are factory programmed.
EEPROM Configuration for Manchester encoding (Version 1 and 11)
Word name
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
Bit 9
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
4
0
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
5
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
Configuration
1
0
0
0
1
0
0
0
1
1
1
1
1
1
1
Bit 10 Bit 11 Bit 12 Bit 13 Bit 14 Bit 15
1
Fig. 7a
EEPROM Configuration for BI-phase encoding and 64 RF cycles/bit data rate (Version 21)
Word name
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
Bit 9
Bit 10 Bit 11 Bit 12 Bit 13 Bit 14 Bit 15
0
1
1
1
1
1
1
1
1
1
0
0
1
0
0
0
0
1
0
0
0
1
1
0
1
0
0
0
0
0
0
0
0
1
2
1
0
1
1
1
0
0
0
1
1
0
0
1
0
0
1
3
0
1
0
0
0
1
0
0
0
1
1
0
0
1
0
1
4
1
1
1
1
1
1
1
1
1
0
0
1
0
0
0
0
5
0
0
0
1
1
0
1
0
0
0
0
0
0
0
0
1
6
1
0
1
1
1
0
0
0
1
1
0
0
1
0
0
1
7
0
1
0
0
0
1
0
0
0
1
1
0
0
1
0
1
Configuration
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Fig. 7b
EEPROM Configuration for BI-phase encoding and 32 RF cycles /bit data rate (Version 31)
Word name
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
Bit 9
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
3
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
4
0
1
1
1
1
1
1
1
1
1
1
1
1
0
1
1
5
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
6
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
7
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
Configuration
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Fig. 7c
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Bit 10 Bit 11 Bit 12 Bit 13 Bit 14 Bit 15
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EM4069
EM4169
ROM organization
The ROM is composed of 64 bits divided in a 9-bit header, 10 nibbles of 4 data bits and 1 row even parity bit, 4 column even
parity bits, and 1 stop bit. The Read ROM command will output the contents of the ROM, starting with bit-0. When bit-64 is
output, the sequence continues with bit-0.
Data in ROM is written by laser programming during manufacturing to form a unique identification code.
Figure below presents the ROM data structure. Bits P0 to P9 are row parity bits and bits PC0 to PC3 are column parity bits.
Parity is even so that a 9 bits set to logic one header can not be reproduced in a data stream.
Bit 0
1
1
1
1
Bit 9
Bit 14
1
D00
D10
1
D01
D11
1
D02
D12
1
D03
D13
1
P0
P1
Bit 8
Bit 13
Bit 18
Header
8 bits customer ID
Bit 19
Bit 24
Bit 29
Bit 34
Bit 39
Bit 44
Bit 49
Bit 54
D20
D30
D40
D50
D60
D70
D80
D90
D21
D31
D41
D51
D61
D71
D81
D91
D22
D32
D42
D52
D62
D72
D82
D92
D23
D33
D43
D53
D63
D73
D83
D93
P2
P3
P4
P5
P6
P7
P8
P9
Bit 23
Bit 28
Bit 33
Bit 38
Bit 43
Bit 48
Bit 53
Bit 58
Unique
device
serial
number
Bit 59
PC0
PC1
PC2
PC3
0
Bit 63
Column parity bits
Fig. 8
Customer ID for all standard versions is 01 hex.
Command description
The EM4069 operates in different modes. The default following a Power on Reset is Read EEPROM mode, and by means of
different commands, the circuit can switch to the following modes :
read access to ROM
write access to 16 bits of EEPROM
write access to configuration word
read access to configuration word
The reader has to generate the commands, which have to be decoded by the EM4069.
Command
Command 1
Command 2
Command 3
Command 4
Command 5
Command
Short name
rst
rROM
wr
wcw
rcw
Bit pattern
1010 0000
1010 0101
1100.add.data.crc
1101 0011.prot.crc
1111 0000
Function
Reset and return to EEPROM read
READ 64 bit ROM
WRITE 16 bit EEPROM word
WRITE configuration word
Read configuration word
Commands rst, rROM and rcw affect readout. An eight-bit pattern has to be sent to execute them. Write commands are longer
since associated address and data have to be sent. The leftmost bit in command bit pattern is transferred first.
Command 1: Reset command
During activation of the transponder a return to default
mode is possible from any mode with the reset command.
Command 4 : Write configuration word
Command 4 has the same structure as command 3. The
16-bit configuration word is written by this command. A
partial locking (write inhibit) of the 128 bit memory is
possible in blocks of 16 bits (16 bit word becomes readonly).
The bits of configuration word are OTP (one time
programmable) so once a certain bit in configuration word
is set it cannot be reset.
Command 2 : Read out of ROM 64 Bits
After activation of command 2, the 64 bit ROM data will be
read out cyclically. This mode will be active until power
down or reset command.
Command 3 : Write 16 Bit EEPROM word
After activation of command 3, a 16-bit EEPROM word can
be written. Data transmission will be secured by CRC
check information, which has to be calculated by the reader
and which will be checked by the EM4069.
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EM4069
EM4169
Command 5 : Read configuration word
Read configuration word command is an auxiliary
command used to read configuration word. This mode will
be active until power down or reset command.
8
4
3
2
Write 16 bit EEPROM Word Command
As described in the Command Table an 8-bit pattern has to
be sent to execute commands rst, rROM and rcw. Bit
pattern of Write Word command is different since word
address, 16 bits of data and 8 bit CRC have to be
transmitted. The Write command bit pattern is the
following:
0
The 8-bit CRC with polynomial u + u + u + u + u is
used in commands 3 and 4. The CRC is calculated
including the Command-Byte.
1100 [4 bit word address] [16 bit data] [8 bit CRC]
CRC Calculation
2
3
U
7 6
MSB
+
5
+
8
4
U
U
U
4
Word address:
One of eight EEPROM words is selected. Valid addresses
are in range from 0 (0000) to 7 (0111)
+
3 2 1 0
LSB
Data bits:
During read out bit which is first sent in is first read out
(FIFO)
+
CRC:
Calculated over whole command stream
Data
+ Exclusive OR
Example of Write Word command:
C5 D2 2D 20 (hex)
Register Stage
The above command (1100 0101) write to
•
Word 5
•
hexadecimal data “D2 2D”
•
CRC bits are hex 20.
Fig. 9
The following table shows the CRC according to some test
bytes:
Byte
[hex]
01
80
in
Resulting CRC
[hex]
1D
26
wr
out Read
Read
tWee
1ms
Fig. 10
In test above it is supposed that the leftmost bit is the MSB
and is transmitted first.
Write Configuration word Command
Configuration word is a special word which is used to lock
(protect from writing) EEPROM words. The bits of
configuration word are OTP (once programmed at 1 they
can not be reprogrammed to 0).
Within 1ms after EEPROM update completion, a further
command will be accepted by the EM4069 without a new
synchronization pattern.
After time-out of this period, the EM4069 will return to read
out mode.
Copyright  2003, EM Microelectronic-Marin SA
Sync.
Special care has to be taken when adding lock bits to
the protection word that already has some bits set to
one. The bits that are already set to one have to be
confirmed at a new command in order to allow writing
of additional bits. If not, bits that are already locked
stay locked, and the new selected bits might not be
programmed.
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EM4069
EM4169
The bit pattern of the Write configuration word command is
compatible to Write Word command:
When the synchronization pattern of modulation on
magnetic field is detected (Command Envelope) the
EM4069 waits for a Start Bit (SB).
1101 0011 [8 bits protecting 8 words] [8 bits don’t care]
[8 bit CRC]
If the start bit is detected before tS3 time-out is expired, the
Command Processing mode is entered.
Eight command bits are serially entered. After the last bit
was shifted, the 8-bit pattern is compared to one of the 5
possible commands. In the case one of the commands is
recognized the appropriate action is performed otherwise
the IC returns in Read mode.
8 bits protecting 8 words:
Bit first sent in is protecting word 0, the second bit protects
word 1 and so on.
8 bits don’t care:
Any 8-bit pattern, all 0 pattern is not suggested for power
supply reasons.
Detection of Command Envelope
CRC has to be correct including also don’t care bits.
The Peak Detector performs the measurement once every
bit period. The Peak Detector circuit compares the peak
value of voltage on the coil to the internal voltage
reference. The result of comparison is one bit of
information, which tells to Control Logic whether the field is
strong (HIGH field) or weak (LOW field).
Example of Write Configuration Word command:
D3 02 55 2F (hex)
The above command (1101 0011) will protect word 6 (0000
0010) from being written.
in
out
The Peak Detector circuit has a built-in hysteresis of
typically 100mV which prevents unwanted Envelope
detection in field strength which is at the level of the
Detector threshold.
Sync. wcw
Read
Read
tWee
Detection of Start Bit (SB) and Command Word
After the Synchronization pattern Envelope was detected,
the EM4069 is sampling the incoming signal at a TRDB /8
rate. The start bit is accepted as valid when three
consecutive samples are LOW.
1ms
Fig. 11
Duration of start bit (version 64 clocks/bit) and following
command bits are expected to be 512 µs (same as one bit
period in read mode). In the version 32 clocks/bit, the
duration is 256 µs
If later on, word 1 has to be protected, the protection bit of
already protected word 6 has to be set to logic 1 again. The
new command will have to be sent with the following
protection bits: 0100 0010.
When the start bit is detected, the Control Logic starts
switching Modulator load OFF and ON (First half of bit
period OFF and second half of bit period ON) to assure
enough power for operation of the IC. Samples of incoming
bits are taken during the time the modulator load is ON
(connected).
Read Configuration word Command
To enter this command the IC has to be in default mode
(read EEPROM bits). After execution of this command the
IC will cyclically read 128 bits.
16 of them will represent the configuration word the rest is
0. It is suggested that don’t care bits of configuration word
are programmed with some pattern which will be easy to
recognize during read out.
The command, address, data and CRC bits are sent in non
coded form (NRZ), reader induced high field (non
modulated) corresponds to logic one, low field (modulated)
to logic zero.
Command Timing for 8-bit command
While IC is in Read mode it is sampling the peak level of
coil voltage (during the time modulator switch is ON) once
every bit period. The peak to peak value is compared with
an internal reference in order to get a one-bit information
(high field or low field). The measured level is compared
with previous samples in order to detect whether there is a
reader-induced modulation present on the magnetic field.
Commands are accepted in the range where normal field
(100% strength) is higher than internal reference
(considered as high field) and modulated field is lower than
internal reference (considered as low field). An 65%
modulation on the reader signal is proposed (high field
100%, low field 20%).
Copyright  2003, EM Microelectronic-Marin SA
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EM4069
EM4169
Modulation of Magnetic Field
The modulation envelope of the magnetic field induced by the reader is observed by the EM4069 as shown in the following
figure.
Synchronization pattern
tS1
tS2
tS3
SB
B0
B1
B2
tRDB
B3
B4
B5
B6
B7
Fig. 12
Comment to above timings:
tS1 : at least 4 samples of peak detector have to be HIGH. In worst case the distance between samples can be 2 bit periods.
tS2 : at least one sample LOW. 2 bit periods + some security since the IC and R/W unit are not synchronized. Duration of 3 bit
periods is suggested.
tS3 : one sample high to enter Command Processing state defines lower limit. Watchdog timer defines higher limit (8 bits
periods) Please note that during this time the Modulator load is permanently on so this is the worst case for Power Supply
level. So using shorter times than upper limit is advised. Duration of 3 bit periods is suggested.
Refer to table 4 for timings range.
In the above example, the Read ROM command (1010 0101) is sent.
After successful 8-bit command detection, the EM4069 will output continuously the ROM contents
.
Reset, Read ROM and Read Configuration Word
commands
The IC treats the Write command as follows:
First byte received is treated in the same way as for an 8bit command. In the case that the processing of the first
byte detects a Write Word command, it first puts the
modulator load OFF for 1/2 bit period. During this time, the
antenna field is High (as stop bit is at logic one) so the
internal power supply capacitor can be charged. Next the
EM4069 transitions to Start Bit Detection State with
modulator load ON and waits for start bit at logic 0. The
time out value is 2 tRDB. If time out is reached before a start
bit is detected, the IC then returns to the read mode.
Normally the start bit comes already after 1 tRDB and the
EM4069 then continues to process the next byte.
After the fourth byte has been detected, the EM4069
verifies if the CRC check is OK and if the word, which is
addressed for writing, is not protected by the configuration
word. Next, power check is performed to determine
whether there is enough power available to write
EEPROM. This operation lasts 1.5-bit periods. In the case
all conditions above are fulfilled (CRC, protection, power
check) EEPROM is written. If one of the conditions fails,
the EM4069 returns in read mode without writing
EEPROM.
After detecting these commands the IC returns in read
mode and starts reading corresponding block (EEPROM or
ROM).
Write Word
commands
and
Write
Configuration
Word
For Write commands, a total of 32 significant bits have to
be transferred from reader to EM4069. The 32 bits are
transferred in a sequence of 4 bytes. Each byte is headed
with start bit at logic 0 (as in normal 8-bit command) and
trailed with stop bit at logic 1. The antenna sends an
uninterrupted sequence of 40 bits (32 command bits, 4
start bits and 4 stop bits).
This data organization ensures re-synchronization of the
EM4069 with the reader signal, and avoids that wrong data
would be extracted due to missing or spurious clocks from
the clock-extractor of the IC.
Copyright  2003, EM Microelectronic-Marin SA
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EM4069
EM4169
NRZ modulation is simple and leads to good results in
proximity of the reader. To send a bit-1, the reader does
not modulate the signal for a complete bit period, and to
send a bit-0, it modulates the carrier frequency during a
whole bit period.
The Write Configuration word command procedure is the
same as above, the only exception is that only CRC
verification and power check are done.
Writing to EEPROM lasts 20 ms.
Long streams of zeros (in write command data sequence
or CRC) reduce writing distance due to drop of supply
voltage under POR level, due to the long time the carrier
frequency is in LOW field mode.
After successful writing of EEPROM the IC sends an
acknowledge pattern to confirm the completion of writing.
Acknowledge pattern consists of switching the modulator
load ON and OFF with a signal period of 256 µs (Option 64
clocks/bit) or 128 µs (Option 32 clocks/bit) representing
half a bit period (a quarter of bit period ON, a quarter of bit
period OFF). Acknowledge pattern is transmitted during a
time equivalent to two bit periods. Pulses of this length do
not occur during data readout so the acknowledge pattern
is easily recognizable.
tRDB
Acknowledge pattern
The writing distance can be improved by using RTO (return
to one) modulation coding. Short burst of high field
(approximately 1/4 of bit period) during transmission of a
bit-0 to EM4069, recharge the on-board power supply
buffer capacitor. To operate in this way, it is important to be
synchronized with the sampling rate of the EM4069.
Figure 14 shows the processing of hexadecimal data “96”
in the write command string. The following signals are
drawn :
EM4069 : shows the modulator state. The “low” peak to
peak value indicates that the modulator load is connected,
and a “high” peak to peak value means that the modulator
load is disconnected.
tRDB
Fig. 13
NRZ : Reader generated field. Low field is forced when
sending a bit-0 and High field for a bit-1. The field is at the
same level for the whole bit duration.
After sending the acknowledge pattern the EM4069
transitions to the Start Bit Detection state and waits for the
start bit of next command. In this way, several words can
be written to EEPROM without returning in read mode after
every write. The value of the timer is 2 tRDB.
RTO : Reader generated field as NRZ, with a burst of high
field during 1/4 period for the transmission of a bit-0.
At the beginning of timing diagram, the EM4069 is in start
bit detection state, modulator load and peak detector are
ON. When the start bit is detected, the logic transitions in
command processing state. 3/8 to 1/2 of a bit period after
beginning of start bit (T1), EM4069 starts putting the
modulator load half bit period OFF and half bit period ON.
The sample of field strength which gives to the logic the
value of bit is taken at the end of ON period.
Disabling of Command Detection
In certain cases the IC logic blocks the detection of the
Synchronization pattern Envelope during one complete
readout cycle of 128 bits. This is valid in the following
cases :
at power up (after POR)
after a Reset command
after a time out occurs in the Start Bit Detection state
(only in the case the transition to Start Bit Detection
state was done from Read mode)
Assuming that the start bit duration is 1 bit period, the
following bit samples are taken 3/8 to 1/2 of bit period after
start of each bit period. So during the last quarter of bit
period the field can be put high to recharge the EM4069
on-board capacitor.
The sampling point can be moved by changing the start bit
duration.
Details about command timing
Command timing is based on NRZ (non-return to zero)
modulation on the magnetic field (as shown in figure 11).
Copyright  2003, EM Microelectronic-Marin SA
11
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EM4069
EM4169
Sampling
EM4069
T1
NRZ
RTO
Dat
Start Bit
Binary
1st bit
2nd bit
3rd bit
4th bit
1
0
0
1
HEX
9
5th bit
0
6th bit
7th bit
1
1
8th bit
0
6
T1 = 3/8 - 1/2 bit period
Fig. 14
Copyright  2003, EM Microelectronic-Marin SA
12
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EM4069
EM4169
Pad Assignment
Pin
Name
Type
Description
1
C1
Analog
coil connection
2
VSS
supply
coil connection,
negative supply
3
VPOS
supply
unregulated
positive supply
4
TIO
Input/
Output
Test pad
5
6
TINC
TST
Input
Input
test pad with pull down
test pad with pull down
7
TCP
Input
test pad with pull down
8
VDD
supply
positive supply
Pad Location:
Pad Location for bumped die:
8
7
6
163
345
2006
5
4
3
8
7
53
6
121
269
547
787
303
5
4
3
95
311
589
829
1657
EM4169
1559
EM4069
2133
1
1
2
2
163
409
506
441
Y
464
1447
525
Y
X
1447
Pad size : 98 X 98
X
All dimensions in µm
Small pad size : 98 X 98
Big pad size : 200 X 600
Fig. 16
Fig. 15
Copyright  2003, EM Microelectronic-Marin SA
All dimensions in µm
13
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EM4069
EM4169
Packages
CID Package
PCB Package
FRONT VIEW
Y
J
TOP VIEW
B
D
Z
K
MARKING
AREA
A
SYMBOL
A
B
D
e
F
g
J
K
R
MIN
8.2
3.8
5.8
0.38
1.25
0.3
0.42
0.115
0.4
TYP
8.5
4.0
6.0
0.5
1.3
0.4
0.44
0.127
0.5
MAX
8.8
4.2
6.2
0.62
1.35
0.5
0.46
0.139
0.6
X
C2
Dimensions are in mm
R
SYMBOL MIN
TYP
X
8.0
Y
4.0
Z
Dimensions are in mm
e
C2
C1
F
F
C1
g
Fig. 17
MAX
1.0
Fig. 18
Ordering Information
Die Form
This chart shows general offering; for detailed Part Number to order, please see the table “Standard Versions” below.
EM4069 A6 WS 11
- %%%
Circuit Nb:
EM4069: standard pads
EM4169: mega pads
Customer Version:
%%% = only for custom specific version
Version:
A6 = Manchester, 64 clocks per bit
A5 = Manchester, 32 clocks per bit
B6 = Bi-phase, 64 clocks per bit
B5 = Bi-phase, 32 clocks per bit
Bumping:
" " (blank) = no bumps (EM4069 only)
E = with Gold Bumps (for EM4169 only)
Die form:
WW = Wafer
WS = Sawn Wafer/Frame
WT = Sticky Tape
WP = Waffle Pack (note 1)
Thickness:
7 = 7 mils (178um)
11 = 11 mils (280um)
Copyright  2003, EM Microelectronic-Marin SA
14
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EM4069
EM4169
Packaged Devices
This chart shows general offering; for detailed Part Number to order, please see the table “Standard Versions” below.
EM4069 A6 CI2L C - %%%
Circuit Nb:
EM4069: standard pads
Customer Version:
%%% = only for custom specific version
Version:
A6 = Manchester, 64 clocks per bit
A5 = Manchester, 32 clocks per bit
B6 = Bi-phase, 64 clocks per bit
B5 = Bi-phase, 32 clocks per bit
Delivery Form:
B = Tape
C = Bulk
Package:
CI2L = CID Pack, 2 pins (length 2.5mm)
CB2R = PCB Package, 2 pins
Remarks:
•
For ordering please use table of “Standard Version” table below.
•
For specifications of Delivery Form, including gold bumps, tape and bulk, as well as possible other delivery form or
packages, please contact EM Microelectronic-Marin S.A.
•
Note 1: This is a non-standard package. Please contact EM Microelectronic-Marin S.A for availability.
Standard Versions
The versions below are considered standards and should be readily available. For other versions or other delivery form,
please contact EM Microelectronic-Marin S.A. Please make sure to give complete part number when ordering.
Part Number
Bit coding
Cycle/
bit
Pads
EM4069 A6 CB2RC
EM4069 A6 CI2LC
EM4069 A6 WP7
EM4069 A6 WS11
EM4069 A6 WS7
EM4069 B5 CB2RC
EM4069 B5 CI2LC
EM4069 B6 CI2LC
EM4069 XX YYY-%%%
Manchester 64
Manchester 64
Manchester 64
Manchester 64
Manchester 64
Bi-phase
32
Bi-phase
32
Bi-phase
64
custom
32/64
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
Standard
EM4169 A6 WS11E
EM4169 XX YYY-%%%
Manchester 64
custom
32/64
Mega
Mega
Delivery Form / For EM internal use
only
Bumping
Package/Die Form
old version
OPS#
3321
3247
3740
3252
3991
3320
3293
3229
PCB Package, 2 pins
CID package, 2 pins (length 2.5mm)
Die in waffle pack, 7 mils
Sawn wafer, 11 mils
Sawn wafer, 7 mils
PCB Package, 2 pins
CID package, 2 pins (length 2.5mm)
CID package, 2 pins (length 2.5mm)
custom
bulk
bulk
no bumps
no bumps
no bumps
bulk
bulk
bulk
no bumps
001
001
001
001
001
031
031
021
%%%
Sawn wafer, 11 mils
custom
with gold bumps
with gold bumps
001
%%%
Product Support
Check our Web Site under Products/RF Identification section.
Questions can be sent to [email protected]
EM Microelectronic-Marin SA cannot assume responsibility for use of any circuitry described other than circuitry
entirely embodied in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to
change the circuitry and specifications without notice at any time. You are strongly urged to ensure that the
information given has not been superseded by a more up-to-date version.
© EM Microelectronic-Marin SA, 04/03, Rev. F
Copyright  2003, EM Microelectronic-Marin SA
15
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