DS2430A+R DALLAS [Dallas Semiconductor], DS2430A+R Datasheet - Page 14

• Manufacturer Part Number: DS2430A+R
• Description: 256-Bit 1-Wire EEPROM
• Manufacturer: DALLAS [Dallas Semiconductor]

MEMORY FUNCTION EXAMPLE
Example: Write 2 data bytes to data memory location 0006 and 0007. Read entire data memory.
MASTER MODE
RX
RX
RX
RX
RX
RX
RX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
TX
DATA (LSB FIRST)
<Data Line High>
<2 Data Bytes>
<2 Data Bytes>
<32 Bytes>
Presence
Presence
Presence
Presence
Presence
Reset
Reset
Reset
Reset
Reset
AAh
CCh
CCh
CCh
CCh
A5h
0Fh
06h
06h
55h
F0h
00h
Reset pulse (480µs to 960µs)
Presence pulse
Issue “Skip ROM” command
Issue “Write Scratchpad” command
Start address = 06h
Write 2 bytes of data to scratchpad
Reset pulse
Presence pulse
Issue “Skip ROM” command
Issue “Read Scratchpad” command
Start address = 06h
Read scratchpad data and verify
Reset pulse
Presence pulse
Issue “Skip ROM” command
Issue “Copy Scratchpad” command
Validation key
Data line is held high for 10ms by the bus master to
provide energy for copying data from the scratchpad to
EEPROM
Reset pulse
Presence pulse
Issue “Skip ROM” command
Issue “Read Memory” command
Start address = 00h
Read EEPROM data page
Reset pulse
Presence pulse
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