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參數(shù)資料
| 型號： | DS1977 |
| 英文描述： | 32KB EEPROM iButton |
| 中文描述： | 密碼保護的32K字節(jié)EEPROM iButton |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 102K |
| 代理商： | DS1977 |
Page 2
1/31/03
ROM ID field
Like all 1-Wire devices, the DS1977 has a 64-bit lasered ROM identification field. The Family
code of the DS1977 in the 64-bit ROM is to be assigned.
Figure 1. 64-BIT LASERED ROM
MSB
LSB
8-Bit
CRC Code
48-Bit Serial Number
8-Bit Family
Code (__h)
MSB
LSB
MSB
LSB
MSB
LSB
Figure 2. Command Hierarchy
BUS
MASTER
DS1977
1-WIRE ROM FUNCTION
COMMANDS
DS1977 SPECIFIC
FUNCTION COMMANDS
OTHER
DEVICES
1-Wire net
COMMAND
LEVEL
AVAILABLE COMMANDS
DATA FIELDS
AFFECTED
READ ROM
MATCH ROM
SEARCH ROM
SKIP ROM
OVERDRIVE MATCH ROM
OVERDRIVE SKIP ROM
RESUME
64-BIT ROM, RC-FLAG
64-BIT ROM, RC-FLAG
64-BIT ROM, RC-FLAG
RC-FLAG
64-BIT ROM, RC-FLAG, OD-FLAG
RC-FLAG, OD-FLAG
RC-FLAG
WRITE SCRATCHPAD
READ SCRATCHPAD
COPY SCRATCHPAD w/PW
READ MEMORY w/PW
VERIFY PASSWORD
READ VERSION
64-BYTE SCRATCHPAD
64-BYTE SCRATCHPAD
DATA MEMORY, PASSWORDS,
PASSWORD ENABLE BYTE
DATA MEMORY, PASSWORDS,
PASSWORD ENABLE BYTE
PASSWORDS
CONTROL REGISTER
Figure 3. Device Memory Map
ADDRESS RANGE
ACCESS TYPE
DESCRIPTION
0000h to 003Fh
R/W
User Data Memory Page 0
0040h to 007Fh
R/W
User Data Memory Page 1
0080h to 7F7Fh
R/W
User Data Memory Pages 2 to 509
7F80h to 7FBFh
R/W
User Data Memory Page 510
7FC0h to 7FC7h
W
Read Access Password (A)
7FC8h to 7FCFh
W
Read/Write Access Password (B)
7FD0h
R/W
Password Control Register
7FD1h to 7FFFh
-----
(reserved)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1977-F5 | 32KB EEPROM iButton |
| DS1982U | UniqueWare iButton |
| DS1985U | UniqueWare iButton |
| DS1986 | 64 kbit Add-Only iButton |
| DS1986-F3 | EPROM|256X32X8|BUTTON|METAL |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1977-F5 | 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1977-F5- | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Password-Protected 32KB EEPROM iButton |
| DS1977-F5# | 功能描述:iButton Password-Protected 32KB EEPROM iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1977-F5+ | 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1981U-F3-1125+ | 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
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