参数资料
型号: DS28E04S-100+T
厂商: Maxim Integrated Products
文件页数: 34/37页
文件大小: 0K
描述: IC EEPROM 4KBIT 16SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
格式 - 存储器: EEPROMs - 串行
存储器类型: EEPROM
存储容量: 4K (256 x 16)
接口: 1 线 串行
工作温度: -40°C ~ 85°C
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC
包装: 带卷 (TR)
DS28E04-100: 4096-Bit 1-Wire Addressable EEPROM with PIO
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
TX
RX
TX
TX
TX
TX
TX
TX
RX
TX
TX
RX
RX
RX
RX
RX
TX
RX
TX
TX
TX
DATA (LSB FIRST)
(Reset)
(Presence)
CCh
0Fh
21h
00h
<5 data bytes>
(Reset)
(Presence)
CCh
AAh
21h
00h
05h
<5 data bytes>
<2 bytes CRC16\>
(Reset)
(Presence)
CCh
55h
21h
COMMENTS
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
TX
00h
TA2
(AUTHORIZATION CODE)
TX
----
RX
TX
RX
TX
TX
TX
TX
RX
TX
RX
05h
<1-Wire idle high>
AAh
(Reset)
(Presence)
CCh
F0h
00h
00h
<550 data bytes>
(Reset)
(Presence)
34 of 37
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
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