參數(shù)資料
型號(hào)： DS2432
元件分類： DRAM
英文描述： 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine
中文描述： 1Kb、保護(hù)型1-Wire EEPROM，帶有SHA-1引擎
文件頁(yè)數(shù)： 25/30頁(yè)
文件大?。?/td> 165K
代理商： DS2432
PRELIMINARY
1-WIRE SIGNALING
The DS2432 requires strict protocols to ensure data integrity. The protocol consists of four types of sig-
naling on one line: Reset Sequence with Reset Pulse and Presence Pulse, Write 0, Write 1 and Read Data.
Except for the presence pulse the bus master initiates all these signals. The DS2432 can communicate at
two different speeds, regular speed and Overdrive Speed. If not explicitly set into the Overdrive mode,
the DS2432 will communicate at regular speed. While in Overdrive Mode the fast timing applies to all
waveforms.
DS2432
25 of 30
The initialization sequence required to begin any communication with the DS2432 is shown in Figure 10.
A Reset Pulse followed by a Presence Pulse indicates the DS2432 is ready to send or receive data. The
bus master transmits (TX) a reset pulse (t
RSTL
, minimum 480 μs at regular speed, 48 μs at Overdrive
Speed). The bus master then releases the line and goes into receive mode (RX). The 1-Wire bus is pulled
to a high state via the pull-up resistor. After detecting the rising edge on the data pin, the DS2432 waits
(t
PDH
, 15-60 μs at regular speed, 2-6 μs at Overdrive speed) and then transmits the Presence Pulse (t
PDL
,
60-240 μs at regular speed, 8-24 μs at Overdrive Speed). A Reset Pulse of 480 μs or longer will exit the
Overdrive Mode returning the device to regular speed. If the DS2432 is in Overdrive Mode and the Reset
Pulse is no longer than 80 μs the device will remain in Overdrive Mode.
INITIALIZATION PROCEDURE “RESET AND PRESENCE PULSES”
Figure 10
MASTER TX “RESET PULSE”
V
PULLUP
V
PULLUP MIN
V
IH MIN
V
IL MAX
0V
REGULAR SPEED
480 μs
≤
t
RSTL
<
∞
*
480 μs
≤
t
RSTH
<
∞
**
15
≤
t
PDH
< 60 μs
60 μs
≤
t
PDL
< 240
OVERDRIVE SPEED
48 μs
≤
t
RSTL
< 80 μs
48 μs
≤
t
RSTH
<
∞
**
15
≤
t
PDH
< 6 μs
8 μs
≤
t
PDL
< 24
RESISTOR
MASTER
DS2432
t
R
t
RSTL
t
PDL
t
RSTH
t
PDH
MASTER RX “PRESENCE PULSE”
*
In order not to mask interrupt signaling by other devices on the 1-Wire bus, t
RSTL
+ t
R
should
always be less than 960 μs.
Includes recovery time
**
相關(guān)PDF資料
PDF描述
DS2432P 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine
DS2432X 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine
DS2432 1k-Bit Protected 1-Wire EEPROM with SHA-1 Engine(1K 位具有寫(xiě)保護(hù)的1線EEPROM（帶SHA-1引擎）)
DS2433 4k-Bit 1-Wire EEPROM
DS2433-Z01 4K-Bit 1-Wire EEPROM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2432_12 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
DS2432P 功能描述:電可擦除可編程只讀存儲(chǔ)器 RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
DS2432P R 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
DS2432P T 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:1Kb Protected 1-Wire EEPROM with SHA-1 Engine
DS2432P/T&R 功能描述:電可擦除可編程只讀存儲(chǔ)器 RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8
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