DS28EC20 Maxim, DS28EC20 Datasheet - Page 25

• Manufacturer Part Number: DS28EC20
• Description: The DS28EC20 is a 20480-bit, 1-Wire® EEPROM organized as 80 memory pages of 256 bits each
• Manufacturer: Maxim

COMMAND-SPECIFIC 1-Wire COMMUNICATION PROTOCOL—LEGEND
COMMAND-SPECIFIC 1-Wire COMMUNICATION PROTOCOL—COLOR CODES
WRITE SCRATCHPAD (CANNOT FAIL)
READ SCRATCHPAD
COPY SCRATCHPAD (SUCCESS)
COPY SCRATCHPAD (BS = 1 OR PF = 1 OR COPY PROTECTED)
Master to Slave
RST
RST
RST
RST
<data to EOM>
<data to EOS>
<data to EOP>
Programming
SYMBOL
CRC16\
AA loop
FF loop
TA-E/S
PD
PD
PD
PD
Select
ERM
CPS
RST
WS
RM
PD
RS
TA
Select
Select
Select
Select
Slave to Master
WS
RS
CPS
CPS
1-Wire reset pulse generated by master.
1-Wire presence pulse generated by slave.
Command and data to satisfy the ROM function protocol.
Command "Write Scratchpad".
Command "Read Scratchpad".
Command "Read Memory".
Command "Extended Read Memory".
Transfer of as many bytes as needed to reach the end of the scratchpad for a given
target address.
Transfer of as many data bytes as are needed to reach the end of the page for a given
target address.
Transfer of an inverted CRC16.
Indefinite loop where the master reads FF bytes.
Data transfer to EEPROM; no activity on the 1-Wire bus permitted during this time.
Command "Copy Scratchpad".
Target address TA1, TA2.
Target address TA1, TA2 with E/S byte.
Transfer of as many data bytes as are needed to reach the end of the memory.
Indefinite loop where the master reads AA bytes.
TA-E/S
TA
TA-E/S
TA-E/S
<Data to EOS>
<Data to EOS>
Programming
Programming
FF Loop
CRC16\
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AA Loop
CRC16\
DESCRIPTION
FF Loop
FF Loop
DS28EC20: 20Kb 1-Wire EEPROM