- 您现在的位置：买卖IC网 > Datasheet目录222 > DS1977-F5# (Maxim Integrated)IBUTTON EEPROM 32KBit F5 Datasheet资料下载
参数资料
| 型号： | DS1977-F5# |
| 厂商： | Maxim Integrated |
| 文件页数： | 25/29页 |
| 文件大小： | 0K |
| 描述： | IBUTTON EEPROM 32KBit F5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| RoHS指令信息： | IButton RoHS Compliance Plan |
| 标准包装： | 14 |
| 系列： | iButton® |
| 存储容量： | 32KB |
| 存储器类型： | EEPROM |
| 产品目录页面： | 1431 (CN2011-ZH PDF) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页当前第25页第26页第27页第28页第29页
DS1977
VERIFY PASSWORD (SUCCESS)
RST
PD
Select
VP
TA
Password
Strong Pullup
AA loop
VERIFY PASSWORD (FAIL ADDRESS OR PASSWORD)
RST
PD
Select
VP
TA
Password
Strong Pullup
FF loop
READ VERSION (CANNOT FAIL)
RST
PD
Select
RV
00h
00h
Version
Version
FF loop
COMMUNICATION EXAMPLES
The examples in this section demonstrate the use of the memory functions in typical situations. The first example
shows how to read the ROM and the version register. In the second example, passwords are installed. The third
example shows how to write a couple of bytes and how to read adjacent memory pages.
EXAMPLE 1
Task : Read the ROM and the version register
With only a single DS1977 connected to the bus master, the communication is as follows:
MASTER MODE
TX
RX
TX
RX
TX
TX
RX
RX
TX
RX
DATA (LSB FIRST)
(Reset)
(Presence)
33h
<8 Bytes ROM ID>
CCh
00h, 00h
<Version>, <Version>
FFh
(Reset)
(Presence)
COMMENTS
Reset Pulse
Presence Pulse
Issue Read ROM Command
Read ROM ID
Issue Read Version Register Command
Write Two 00h Bytes
Read Chip Version Code Twice
Additional Reads Result in FFh Bytes
Reset Pulse
Presence pulse
EXAMPLE 2
Task : Install and activate passwords; passwords are currently not activated
This task is broken into the following steps:
1. Write new passwords to scratchpad
2. Read Scratchpad
3. Copy scratchpad
4. Verify new passwords
5. Activate password
25 of 29
相关PDF资料 |
PDF描述 |
|---|---|
| DS1982-F5+ | IBUTTON 1KBit ADD-ONLY F5 |
| DS1985-F3+ | IBUTTON 16KBit ADD-ONLY F3 |
| DS1990A-F3+ | IC IBUTTON SERIAL NUMBER F3 |
| DS1990R-F5# | IBUTTON SERIAL NUMBER F5 |
| DS1993L-F5+ | IBUTTON MEMORY 4KBit F5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1977-F5# | 功能描述:iButton Password-Protected 32KB 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 |
| DS1977-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 |
| DS1981U-F3-1125+ | 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 |
| DS1981U-F3-114C+ | 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 |
| DS1981U-F5-1124+ | 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 |
发布紧急采购，3分钟左右您将得到回复。