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DS2431
1024-Bit, 1-Wire EEPROM
Memory Function Example
Write to the first 8 bytes of memory page 1. Read the
entire memory.
With only a single DS2431 connected to the bus mas-
ter, the communication looks like this:
MASTER MODE
Tx
Rx
Tx
Tx
Tx
Tx
Tx
Rx
Tx
Rx
Tx
Tx
Rx
Rx
Rx
Rx
Rx
Tx
Rx
Tx
Tx
Tx
DATA (LSB FIRST)
(Reset)
(Presence)
CCh
0Fh
20h
00h
<8 Data Bytes>
<2 Bytes CRC-16 >
(Reset)
(Presence)
CCh
AAh
20h
00h
07h
<8 Data Bytes>
<2 Bytes CRC-16 >
(Reset)
(Presence)
CCh
55h
20h
COMMENTS
Reset pulse
Presence pulse
Issue “Skip ROM ” command
Issue “Write Scratchpad” command
TA1, beginning offset = 20h
TA2, address = 0020h
Write 8 bytes of data to scratchpad
Read CRC to check for data integrity
Reset pulse
Presence pulse
Issue “Skip ROM ” command
Issue “Read Scratchpad” command
Read TA1, beginning offset = 20h
Read TA2, address = 0020h
Read E/S, ending offset = 111b, AA, PF = 0
Read scratchpad data and verify
Read CRC to check for data integrity
Reset pulse
Presence pulse
Issue “Skip ROM ” command
Issue “Copy Scratchpad” command
TA1
Tx
00h
TA2
(AUTHORIZATION CODE)
22
Tx
—
Rx
Tx
Rx
Tx
Tx
Tx
Tx
Rx
Tx
Rx
07h
<1-Wire Idle High>
AAh
(Reset)
(Presence)
CCh
F0h
00h
00h
<144 Data Bytes>
(Reset)
(Presence)
E/S
Wait t PROGMAX for the copy function to complete
Read copy status, AAh = success
Reset pulse
Presence pulse
Issue “Skip ROM ” command
Issue “Read Memory” command
TA1, beginning offset = 00h
TA2, address = 0000h
Read the entire memory
Reset pulse
Presence pulse
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相关代理商/技术参数
DS2431G-W0V+2T 制造商:Maxim Integrated Products 功能描述:1024-BIT 1-WIRE EEPROM - Tape and Reel
DS2431G-W0V+3T 制造商:Maxim Integrated Products 功能描述:1024-BIT 1-WIRE EEPROM - Tape and Reel
DS2431G-W0V-2T 制造商:Maxim Integrated Products 功能描述:
DS2431G-W0V-3T 制造商:Maxim Integrated Products 功能描述:
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DS2431P R 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1024-Bit, 1-Wire EEPROM
DS2431P T 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1024-Bit, 1-Wire EEPROM
DS2431P/R 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:1024-Bit 1-Wire EEPROM