參數(shù)資料
型號(hào)： DS28EA00U+T&R
廠商： Maxim Integrated
文件頁(yè)數(shù)： 19/29頁(yè)
文件大小： 328K
描述： IC THERMOMETER 1-WIRE 8-USOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 3,000
功能： 溫度計(jì)，恒溫計(jì)
傳感器類型： 內(nèi)部
感應(yīng)溫度： -40°C ~ 85°C
精確度： ±0.5°C（最小值）
拓?fù)洌?/td> 寄存器庫(kù)，變簽式暫存器
輸出類型： 數(shù)字
輸出警報(bào)： 是
輸出風(fēng)扇： 無(wú)
電源電壓： 3 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）
供應(yīng)商設(shè)備封裝： 8-uMAX
包裝： 帶卷 (TR)
Skip ROM [CCh]
This command can save time in a single-drop bus sys-
tem by allowing the bus master to access the control
functions without providing the 64-bit ROM code. If
more than one slave is present on the bus and, for
example, a read command is issued following the Skip
ROM command, data collision occurs on the bus as
multiple slaves transmit simultaneously (open-drain
pulldowns produce a wired-AND result).
Overdrive-Skip ROM [3Ch]
On a single-drop bus this command can save time by
allowing the bus master to access the control functions
without providing the 64-bit ROM code. Unlike the nor-
mal Skip ROM command, the Overdrive-Skip ROM sets
the DS28EA00 in the overdrive mode (OD = 1). All com-
munication following this command has to occur at
overdrive speed until a reset pulse of minimum 480祍
duration resets all devices on the bus to standard
speed (OD = 0).
When issued on a multidrop bus, this command sets all
overdrive-supporting devices into overdrive mode. To
subsequently address a specific overdrive-supporting
device, a reset pulse at overdrive speed has to be
issued followed by a Match ROM or Search ROM com-
mand sequence. This speeds up the time for the
search process. If more than one slave supporting
overdrive is present on the bus and the Overdrive-Skip
ROM command is followed by a Read command, data
collision occurs on the bus as multiple slaves transmit
simultaneously (open-drain pulldowns produce a wired-
AND result).
Overdrive-Match ROM [69h]
The Overdrive-Match ROM command followed by a
64-bit ROM sequence transmitted at overdrive speed
allows the bus master to address a specific DS28EA00
on a multidrop bus and to simultaneously set it in over-
drive mode. Only the DS28EA00 that exactly matches
the 64-bit ROM sequence responds to the subsequent
control function command. Slaves already in overdrive
mode from a previous Overdrive-Skip ROM or success-
ful Overdrive-Match ROM command remain in over-
drive mode. All overdrive-capable slaves return to
standard speed at the next reset pulse of minimum
480祍 duration. The Overdrive-Match ROM command
can be used with a single device or multiple devices on
the bus.
1-Wire Digital Thermometer with
Sequence Detect and PIO
DS28EA00
Maxim Integrated
19
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