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DS28EC20: 20Kb 1-Wire EEPROM
Figure 7-1. Memory Function Flowchart
Bus Master TX Memory
Function Command
From ROM Functions
Flow Chart (Figure 9)
2
Part
0Fh
Write Scratch-
pad ?
Y
N
To Figure 7,
nd
Bus Master TX EEPROM
Array Target Address
TA1 (T[7:0]), TA2 (T[15:8])
DS28EC20 sets Scratch-
pad Offset = (T[4:0]),
Clears PF, AA, BS
Master TX Data Byte
To Scratchpad Offset
DS28EC20 sets (E[4:0]) =
Scratchpad Offset
Note : The PF Flag is set upon power-
on reset. It is cleared only if a com-
plete 16-bit target address is trans-
mitted. Sending less than 16 bits for
the target address sets the PF flag.
If the memory is write-protected , the
DS28EC20 copies the data byte from
the target address into the scratchpad.
If the memory is in EPROM mode , the
DS28EC20 stores the bitwise logical
AND of the transmitted byte and the
data byte from the targeted address
into the scratchpad.
DS28EC20
Increments
Scratchpad
Offset
N
Master
TX Reset ?
N
Scrpad. Offset
= 11111b?
Y
Y
Partial
Byte ?
Y
PF = 1
N
DS28EC20 TX CRC16
of Command, Address,
Data Bytes as they were
sent by the bus master
2
Part
Bus Master
RX “1”s
N
Master
TX Reset?
Y
To ROM Functions
Flow Chart (Figure 9)
12 of 27
From Figure 7,
nd
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相关代理商/技术参数
DS28EC20-224-BB+ 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
DS28EC20P 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:DS28EC20_1203
DS28EC20P T 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:DS28EC20_1203
DS28EC20P+ 功能描述:电可擦除可编程只读存储器 20Kb 1-Wire 电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
DS28EC20P+T 功能描述:电可擦除可编程只读存储器 20Kb 1-Wire 电可擦除可编程只读存储器 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8
DS28EC20P-224-BB+T 制造商:Maxim Integrated Products 功能描述:- Tape and Reel
DS28EC20Q-A5A-5A+T 制造商:Maxim Integrated Products 功能描述:20KB 1-WIRE EEPROM - Tape and Reel
DS28EC20Q-A5A-5A+W 制造商:Maxim Integrated Products 功能描述:20KB 1-WIRE EEPROM - Rail/Tube