P4069 EM Microelectronic, P4069 Datasheet - Page 7

• Manufacturer Part Number: P4069
• Description: 128 Bit Read/write Contactless Identification Device With Otp Function
• Manufacturer: EM Microelectronic

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.
Customer ID for all standard versions is 01 hex.
Command description
The P4069 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 :
The reader has to generate the commands, which have to be decoded by the P4069.
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 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.
read access to ROM
write access to 16 bits of EEPROM
write access to configuration word
read access to configuration word
Bit 0
Command 1
Command 2
Command 3
Command 4
Command 5
Command
ROM organization
EM MICROELECTRONIC-MARIN SA
1
1
Short name
Command
1
rROM
wcw
rcw
rst
wr
Bit 9
Bit 14
Bit 19
Bit 24
Bit 29
Bit 34
Bit 39
Bit 44
Bit 49
Bit 54
Bit 59
1
PC0
D00
D10
D20
D30
D40
D50
D60
D70
D80
D90
1
1101 0011.prot.crc
1100.add.data.crc
D01
D11
D21
D31
D41
D51
D61
D71
D81
D91
PC1
Bit pattern
1010 0000
1010 0101
1111 0000
1
D02
D12
D22
D32
D42
D52
D62
D72
D82
D92
PC2
1
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 P4069.
PC3
D03
D13
D23
D33
D43
D53
D63
D73
D83
D93
1
Reset and return to EEPROM read
READ 64 bit ROM
WRITE 16 bit EEPROM word
WRITE configuration word
Read configuration word
P0
P1
P2
P3
P4
P5
P6
P7
P8
P9
1
0
Bit 8
Bit 13
Bit 18
Bit 23
Bit 28
Bit 33
Bit 38
Bit 43
Bit 48
Bit 53
Bit 58
Bit 63
P4069/P4169
Function
Header
8 bits customer ID
Unique
device
serial
number
Column parity bits
Figure 8
Table 5
7