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參數(shù)資料
| 型號： | DS1921 |
| 英文描述： | High-Resolution Thermochron iButton |
| 中文描述： | 高分辨率Thermochron iButton的 |
| 文件頁數(shù)： | 31/44頁 |
| 文件大?。?/td> | 271K |
| 代理商： | DS1921 |
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DS1921H/Z
31 of 44
READ/WRITE TIMING DIAGRAM
Figure 15
Write-One Time Slot
RESISTOR
MASTER
V
PUP
V
IHMASTER
V
TH
V
TL
V
ILMAX
0V
t
F
t
SLOT
t
W1L
ε
Write-Zero Time Slot
RESISTOR
MASTER
t
REC
V
PUP
V
IHMASTER
V
TH
V
TL
V
ILMAX
0V
t
F
t
SLOT
t
W0L
Read-Data Time Slot
RESISTOR
MASTER
DS1921H/Z
t
REC
V
PUP
V
IHMASTER
V
TH
V
TL
V
ILMAX
0V
Master
Sampling
Window
δ
t
F
t
SLOT
t
RL
t
MSR
Slave to Master
A
read-data
time slot begins like a write-one time slot. The voltage on the data line must remain below
V
TL
until the read low time t
RL
is expired. During the t
RL
window, when responding with a 0, the
DS1921H/Z will start pulling the data line low; its internal timing generator determines when this pull-
down ends and the voltage starts rising again. When responding with a 1, the DS1921H/Z will not hold
the data line low at all, and the voltage starts rising as soon as t
RL
is over.
The sum of t
RL
+
δ
(rise rime) on one side and the internal timing generator of the DS1921H/Z on the
other side define the master sampling window (t
MSRMIN
to t
MSRMAX
) in which the master must perform a
read from the data line. For most reliable communication, t
RL
should be as short as permissible and the
master should read close to but no later than t
MSRMAX
. After reading from the data line, the master must
wait until t
SLOT
is expired. This guarantees sufficient recovery time t
REC
for the DS1921H/Z to get ready
for the next time slot.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1921H-F5 | High-Resolution Thermochron iButton |
| DS1921Z-F5 | High-Resolution Thermochron iButton |
| DS1963L-F5 | NVRAM (Battery Based) |
| DS1963S | SHA iButton |
| DS1971 | 256-Bit EEPROM iButton |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1921G | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Thermochron iButton |
| DS1921G_11 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Logs Up to 2048 Consecutive Temperature Thermochron iButton |
| DS1921G_1109 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Thermochron iButton |
| DS1921G_12 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Thermochron iButton |
| DS1921G-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 |
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