DS28E04S-100+T Maxim Integrated Products, DS28E04S-100+T Datasheet - Page 34

IC EEPROM 4KBIT 16SOIC

DS28E04S-100+T

Manufacturer Part Number
DS28E04S-100+T
Description
IC EEPROM 4KBIT 16SOIC
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS28E04S-100+T

Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Memory Size
4K (256 x 16)
Interface
1-Wire Serial
Operating Temperature
-40°C ~ 85°C
Package / Case
16-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Supply
-
Speed
-
MEMORY FUNCTION EXAMPLE
Write 5 bytes to memory page 1, starting at address 0021h. Read the entire memory and the PIO-related registers.
With only a single DS28E04-100 connected to the bus master, the communication looks like this:
MASTER MODE
RX
RX
RX
RX
RX
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
TX
TX
DATA (LSB FIRST)
<2 bytes CRC16\>
<1-Wire idle high>
<550 data bytes>
<5 data bytes>
<5 data bytes>
(Presence)
(Presence)
(Presence)
(Presence)
(Presence)
(Reset)
(Reset)
(Reset)
(Reset)
(Reset)
CCh
CCh
AAh
CCh
AAh
CCh
0Fh
F0h
21h
00h
21h
00h
05h
55h
21h
00h
05h
00h
00h
34 of 36
Reset pulse
Presence pulse
Issue “Skip ROM” command
Issue “Write Scratchpad” command
TA1, beginning offset = 21h
TA2, address = 0021h
Write 5 bytes of data to scratchpad
Reset pulse
Presence pulse
Issue “Skip ROM” command
Issue “Read Scratchpad” command
Read TA1, beginning offset = 21h
Read TA2, address = 0021h
Read E/S, ending offset = 00101b, 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
TA2
E/S
Wait 10ms 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
(AUTHORIZATION CODE)
COMMENTS

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