參數(shù)資料
型號(hào)： DS2502S
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： Programmable ROM
英文描述： 128 X 8 OTPROM, PDSO8
封裝： 0.150 INCH, SOIC-8
文件頁(yè)數(shù)： 6/23頁(yè)
文件大小： 663K
代理商： DS2502S
DS2502
14 of 23
A multidrop bus consists of a 1-Wire bus with multiple slaves attached. At regular speed the 1-Wire bus
has a maximum data rate of 16.3 kbits per second. If the bus master is also required to perform
programming of the EPROM portions of the DS2502, a programming supply capable of delivering up to
10 milliamps at 12 volts for 480 s is required. The idle state for the 1-Wire bus is high. If, for any
reason, a transaction needs to be suspended, the bus MUST be left in the idle state if the transaction is to
resume. If this does not occur and the bus is left low for more than 120 s, one or more of the devices on
the bus may be reset.
Transaction Sequence
The sequence for accessing the DS2502 via the 1-Wire port is as follows:
Initialization
ROM Function Command
Memory Function Command
Read/Write Memory/Status
INITIALIZATION
All transactions on the 1-Wire bus begin with an initialization sequence. The initialization sequence
consists of a reset pulse transmitted by the bus master followed by a presence pulse(s) transmitted by the
slave(s).
The presence pulse lets the bus master know that the DS2502 is on the bus and is ready to operate. For
more details, see the “1-Wire Signaling” section.
ROM FUNCTION COMMANDS
Once the bus master has detected a presence, it can issue one of the six ROM function commands. All
ROM function commands are 8 bits long. A list of these commands follows (refer to flowchart in Figure
9):
Read ROM [33H]
This command allows the bus master to read the DS2502’s 8-bit family code, unique 48-bit serial
number, and 8-bit CRC. This command can be used only if there is a single DS2502 on the bus. If more
than one slave is present on the bus, a data collision will occur when all slaves try to transmit at the same
time (open drain will produce a wired-AND result).
Match ROM [55H]
The Match ROM command, followed by a 64-bit ROM sequence, allows the bus master to address a
specific DS2502 on a multidrop bus. Only the DS2502 that exactly matches the 64-bit ROM sequence
will respond to the subsequent memory function command. All slaves that do not match the 64-bit ROM
sequence will wait for a reset pulse. This command can be used with a single or multiple devices on the
bus.
相關(guān)PDF資料
PDF描述
DS2502 128 X 8 OTPROM, PBCY3
DS2505/T&R 16K X 1 OTPROM, PBCY3
DS2505P 16K X 1 OTPROM, PDSO6
DS2505P/T&R 16K X 1 OTPROM, PDSO6
DS2505 16K X 1 OTPROM, PBCY3
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2502S/R 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1 kbit Add-Only Memory
DS2502S/T 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:1 kbit Add-Only Memory
DS2502S/T&R 制造商:Maxim Integrated Products 功能描述:IC OTP 1KBIT 8SOIC
DS2502S/T&R 功能描述:可擦除可編程ROM RoHS:否 制造商:Maxim Integrated 類型: 存儲(chǔ)容量:1024 bit 組織:1 K x 1 接口類型: 工作電流:5 uA 編程電壓: 工作電源電壓:2.8 V to 6 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:TO-92
DS2502S+ 功能描述:可擦除可編程ROM 1Kb Add-Only Memory RoHS:否 制造商:Maxim Integrated 類型: 存儲(chǔ)容量:1024 bit 組織:1 K x 1 接口類型: 工作電流:5 uA 編程電壓: 工作電源電壓:2.8 V to 6 V 最大工作溫度:+ 85 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:TO-92
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*