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参数资料
| 型号： | ADM1069ASTZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 28/32页 |
| 文件大小： | 0K |
| 描述： | IC SUPERVISOR/SEQUENCER 32-LQFP |
| 标准包装： | 1 |
| 系列： | Super Sequencer® |
| 类型： | 序列发生器 |
| 监视电压数目： | 8 |
| 输出： | 可编程 |
| 电压 - 阀值： | 8 种可选阀值组合 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-LQFP |
| 供应商设备封装： | 32-LQFP（7x7） |
| 包装： | 托盘 |
| 产品目录页面： | 788 (CN2011-ZH PDF) |
| 配用： | EVAL-ADM1069LQEBZ-ND - BOARD EVALUATION FOR ADM1069LQ |
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ADM1069
SMBus PROTOCOLS FOR RAM AND EEPROM
The ADM1069 contains volatile registers (RAM) and nonvola-
tile registers (EEPROM). User RAM occupies Address 0x00 to
Address 0xDF; the EEPROM occupies Address 0xF800 to
Address 0xFBFF.
In the ADM1069, the send byte protocol is used for the following
two purposes:
? To write a register address to the RAM for a subsequent
single byte read from the same address, or for a block read
Data can be written to and read from both the RAM and the
EEPROM as single data bytes. Data can be written only to
unprogrammed EEPROM locations. To write new data to a
1
S
2
SLAVE
ADDRESS
W
3
A
4
RAM
ADDRESS
(0x00 TO 0xDF)
5
A
6
P
programmed location, the location contents must first be erased.
Figure 39. Setting a RAM Address for Subsequent Read
SLAVE
ADDRESS
EEPROM erasure cannot be done at the byte level. The EEPROM
is arranged as 32 pages of 32 bytes each, and an entire page must
be erased.
Page erasure is enabled by setting Bit 2 in the UPDCFG register
(Address 0x90) to 1. If this bit is not set, page erasure cannot
occur, even if the command byte (0xFE) is programmed across
the SMBus.
WRITE OPERATIONS
The SMBus specification defines several protocols for different
types of read and write operations. The following abbreviations
? S = Start
? P = Stop
? R = Read
? W = Write
?
To erase a page of EEPROM memory. EEPROM memory
can be written to only if it is unprogrammed. Before writing
to one or more EEPROM memory locations that are already
programmed, the page(s) containing those locations must
first be erased. EEPROM memory is erased by writing a
command byte.
The master sends a command code telling the slave device to
erase the page. The ADM1069 command code for a page
erasure is 0xFE (1111 1110). Note that, for a page erasure
to take place, the page address must be given in the previous
write word transaction (see the Write Byte/Word section).
In addition, Bit 2 in the UPDCFG register (Address 0x90)
must be set to 1.
1 2 3 4 5 6
COMMAND
S W A BYTE A P
(0xFE)
?
?
A = Acknowledge
A = No acknowledge
Figure 40. EEPROM Page Erasure
As soon as the ADM1069 receives the command byte,
The ADM1069 uses the following SMBus write protocols.
Send Byte
In a send byte operation, the master device sends a single
command byte to a slave device, as follows:
page erasure begins. The master device can send a stop
command as soon as it sends the command byte. Page
erasure takes approximately 20 ms. If the ADM1069 is
accessed before erasure is complete, it responds with a
no acknowledge (NACK).
1.
2.
3.
4.
5.
6.
The master device asserts a start condition on SDA.
The master sends the 7-bit slave address followed by the
write bit (low).
The addressed slave device asserts an acknowledge (ACK)
on SDA.
The master sends a command code.
The slave asserts ACK on SDA.
The master asserts a stop condition on SDA and the
transaction ends.
Rev. C | Page 28 of 32
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADM1069ASTZ-REEL | 功能描述:IC SEQUENCER/SUPERVISOR 32LQFP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:Super Sequencer® 标准包装:1 系列:- 类型:简单复位/加电复位 监视电压数目:1 输出:开路漏极或开路集电极 复位:高有效 复位超时:- 电压 - 阀值:1.8V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:6-TSOP（0.059"，1.50mm 宽）5 引线 供应商设备封装:5-TSOP 包装:剪切带 (CT) 其它名称:NCP301HSN18T1GOSCT |
| ADM1069ASTZ-REEL7 | 功能描述:IC SEQUENCER/SUPERVISOR 32LQFP RoHS:是 类别:集成电路 (IC) >> PMIC - 监控器 系列:Super Sequencer® 其它有关文件:STM6905 View All Specifications 标准包装:1 系列:- 类型:多压监控器 监视电压数目:5 输出:开路漏极或开路集电极 复位:低有效 复位超时:最小为 140 ms 电压 - 阀值:2.188V，2.955V，可调，可调，可调 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-TSSOP 包装:Digi-Reel® 产品目录页面:1197 (CN2011-ZH PDF) 其它名称:497-8728-6 |
| ADM1070 | 制造商:AD 制造商全称:Analog Devices 功能描述:-48 V Hot Swap Controller |
| ADM1070ART | 制造商:AD 制造商全称:Analog Devices 功能描述:-48 V Hot Swap Controller |
| ADM1070ART-REEL | 制造商:Analog Devices 功能描述:Hot Swap Controller 1-CH -80V 6-Pin SOT-23 T/R 制造商:Analog Devices 功能描述:6-PIN -48V HOT SWAP CONTROLLER I.C. - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:6-PIN -48V HOT SWAP CONTROLLER I.C. - Tape and Reel |
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