1024-Bit EEPROM iButton
FROM FIGURE 7a
55h
COPY SCRATCHPAD?
Y
BUS MASTER Tx
N
APPLICABLE TO ALL R/W
MEMORY LOCATIONS.
F0h
READ MEMORY?
Y
BUS MASTER Tx
N
TA1 (T[7:0]), TA2 (T[15:8])
AND E/S BYTE
TA1 (T[7:0]), TA2 (T[15:8])
AUTH. CODE
MATCH?
N
Y
T[15:0] < 0090h?
N
Y
ADDRESS < 90h?
N
Y
DS1972 SETS MEMORY
ADDRESS = (T[15:0])
N
PF = 0?
DS1972
BUS MASTER Rx
Y
Y
COPY PROTECTED?
INCREMENTS
ADDRESS
COUNTER
DATA BYTE FROM
MEMORY ADDRESS
N
AA = 1
MASTER Tx RESET?
N
Y
BUS MASTER
Rx "1"s
DS1972 COPIES
Y
ADDRESS < 8Fh?
N
MASTER Tx RESET?
DURATION: t PROG
SCRATCHPAD
DATA TO ADDRESS
*
N
Y
BUS MASTER
Rx "1"s
DS1972 Tx "0"
BUS MASTER
Rx "1"s
N
MASTER Tx RESET?
Y
MASTER Tx RESET?
Y
N
Y
MASTER Tx RESET?
N
DS1972 Tx "1"
MASTER Tx RESET?
N
TO FIGURE 7a
Y
* 1-Wire IDLE HIGH FOR POWER.
Figure 7b. Memory Function Flowchart (continued)
______________________________________________________________________________________
11
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相关代理商/技术参数
DS1972-F5 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1024-Bit EEPROM iButton
DS1972-F5# 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1972-F5+ 功能描述:iButton 1024-Bit EEPROM iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1973 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:4-kbit EEPROM iButton
DS1973+F3 制造商:Maxim Integrated Products 功能描述:EEPROM SERL-1WIRE 4KBIT 16PAGES X 256 3.3V/5V F3 CA - Rail/Tube
DS1973+F5 制造商:Maxim Integrated Products 功能描述:IC MEMORY I BUTTON 1973
DS1973-F3 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1973-F3# 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated