DS2433
MEMORY FUNCTION EXAMPLE
Example: Write two data bytes to memory location 0026 and 0027. Read entire memory.
MASTER MODE
Tx
Rx
Tx
Tx
Tx
Tx
Tx
Tx
Rx
Tx
Tx
Rx
Rx
Rx
Rx
Tx
Rx
Tx
Tx
Tx
Tx
Tx
Tx
Tx
Rx
Tx
Tx
Tx
Tx
Rx
Tx
Rx
DATA (LSB FIRST)
Reset
Presence
CCh
0Fh
26h
00h
<2 data bytes>
Reset
Presence
CCh
AAh
26h
00h
07h
<2 data bytes>
Reset
Presence
CCh
55h
26h
00h
07h
<idle or strong pullup>
Reset
Presence
CCh
F0h
00h
00h
<512 bytes>
Reset
Presence
COMMENTS
Reset Pulse (480 ? s to 960 ? s)
Presence Pulse
Issue Skip ROM Command
Issue Write Scratchpad command
TA1, beginning offset = 26h
TA2, address = 0026h
Write 2 bytes of data to scratchpad
Reset Pulse
Presence Pulse
Issue Skip ROM Command
Issue Read Scratchpad command
Read TA1, beginning offset = 26h
Read TA2, address = 0026h
Read E/S, ending offset = 7h, flags = 0h
Read scratchpad data and verify
Reset Pulse
Presence Pulse
Issue Skip ROM Command
Issue Copy Scratchpad command
TA1
TA2 AUTHORIZATION CODE
E/S
Wait 5ms
Reset Pulse
Presence Pulse
Issue Skip ROM Command
Issue Read Memory command
TA1, beginning offset = 0
TA2, address = 0000h
Read entire memory
Reset Pulse
Presence Pulse, done
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相关代理商/技术参数
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