EM4205-EM4305
Controller
The Controller controls the state of the IC. Its main states
are Power Off (power supply below POR level), Power-up
Initialization, Default Read mode and Command
processing.
Word 2 contains a 32 bit password. The password value
can be changed only after a successful Login command.
Word 3 is a user free word. Similar to Word 0, it can store
user specific information.
Configuration Register
At power-up, when the power supply level gets higher
than POR threshold, the content of the EEPROM
Configuration word is transferred to the Configuration
register to define default operating mode of the IC.
Word 4 is a Configuration word used to define the device-
operating modes and options.
Words 5 to 13 are user free (288 bits) which can be part
of a default message.
Sequencer
The Sequencer gets its clock signal from the Clock
extractor and generates the Data Rate clock and other
timing signals needed for operation of the other blocks.
Data rate is defined by the number ‘n’ stored in the
Configuration word.
Words 14 and 15 are used to protect Words 0 to 13 from
being modified using Write Word command.
Addr.
(dec)
Description
Type
B0,.
RW ct0
..,b31
Ct31
Chip Type, Res Cap
Customer code/
User free
Encoder
0
-
The Encoder encodes serial NRZ data before it is
transmitted to the modulator switch. Two encoding options
are implemented: Manchester and Bi-phase.
1
2
UID number
Password
RA uid0 - uid31
WO ps0
RW us0
RW co0
RW us0
RW us0
RW us0
RW us0
RW us0
RW us0
RW us0
RW us0
RW us0
RP pr0
RP pr0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
ps31
us31
co31
us31
us31
us31
us31
us31
us31
us31
us31
us31
pr31
3
User free
Command Decoder
4
Configuration word
User free
The Command Decoder observes output of the Data
Extractor. When a field stop is detected, it puts the
Controller into Command Processing state and starts to
decode the incoming data.
5
6
User free
7
User free
8
User free
FROM
TO ALL
BLOCKS
SEQUENCER
9
User free
CLOCK
EXTRACTOR
10
11
12
13
14
15
User free
TO
CONTROLLER
EEPROM
CONFIGURATION
REGISTER
User free
User free
FROM
User free
EEPROM
Protection word 1
Protection word 2
pr31
TO
Table 5
ENCODER
MODULATOR
Word types:
RA: access using Read Word command only
RW: access using Read Word and Write Word command
WO: access using Write Word command only
FROM
COMMAND
DECODER
DATA
EXTRACTOR
RP: access using Read Word and Protect command
Figure 6
Organization of Word 0
Word 0 is factory programmed with information on:
EEPROM Organization
512 bits of EEPROM are organized in 16 words of 32 bits.
Chip Type: fixed 4 bit number indicating member of
the compatible family of chips.
On-chip resonant capacitor values: 210pF, 250pF, or
330pF
The EEPROM words are numbered from 0 to 15.
The bits, in a word, are numbered from 0 to 31. The LSB
first principle is always respected.
10 bit Customer code
Word 0 can be reprogrammed by the user.
The 32 bits of EEPROM word are programmed with one
Write Word Command.
Word 0 is assigned either to factory programmed Chip
Type, resonant capacitor version and Customer Code
number, or it can be reprogrammed by user to store some
other data. Since this word is not part of the default
message, it can be used to store some useful information
which can only be accessed by the Read Word command.
Word 1 contains the IC unique identification number (UID)
programmed at the factory. It can be accessed by a Read
command.
5
www.emmicroelectronic.com
Copyright 2013, EM Microelectronic-Marin SA
4205-4305-DS-01.doc, Version 4.0, 22-Oct-13
EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
