- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄97865 > DS1996L-F5 (DALLAS SEMICONDUCTOR) SPECIALTY MEMORY CIRCUIT, MADB2 PDF資料下載
參數(shù)資料
| 型號(hào)： | DS1996L-F5 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Memory IC:Other |
| 英文描述： | SPECIALTY MEMORY CIRCUIT, MADB2 |
| 封裝： | MICRO CAN |
| 文件頁數(shù)： | 3/18頁 |
| 文件大?。?/td> | 321K |
| 代理商： | DS1996L-F5 |
DS1996
11 of 18
Match ROM [55H]
The match ROM command, followed by a 64-bit ROM sequence, allows the bus master to address a
specific DS1996 on a multidrop bus. Only the DS1996 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.
Skip ROM [CCH]
This command can save time in a single drop bus system by allowing the bus master to access the
memory functions without providing the 64-bit ROM code. If more than one slave is present on the bus
and a read command is issued following the Skip ROM command, data collision will occur on the bus as
multiple slaves transmit simultaneously (open drain pulldowns will produce a wired–AND result).
Search ROM [F0H]
When a system is initially brought up, the bus master might not know the number of devices on the 1-
Wire bus or their 64-bit ROM codes. The search ROM command allows the bus master to use a process
of elimination to identify the 64-bit ROM codes of all slave devices on the bus. The search ROM process
is the repetition of a simple 3-step routine: read a bit, read the complement of the bit, then write the
desired value of that bit. The bus master performs this simple, 3-step routine on each bit of the ROM.
After one complete pass, the bus master knows the contents of the ROM in one device. The remaining
number of devices and their ROM codes may be identified by additional passes. See Chapter 5 of the
Book of DS19xx iButton Standards for a comprehensive discussion of a search ROM, including an actual
example.
Overdrive Skip ROM [3CH]
On a single-drop bus this command can save time by allowing the bus master to access the memory
functions without providing the 64-bit ROM code. Unlike the normal Skip ROM command the Overdrive
Skip ROM sets the DS1996 in the Overdrive Mode (OD=1). All communication following this command
has to occur at Overdrive Speed until a reset pulse of minimum 480 s duration resets all devices on the
bus to regular speed (OD=0).
When issued on a multidrop bus this command will set all Overdrive-capable devices into Overdrive
mode. To subsequently address a specific Overdrive-capable device, a reset pulse at Overdrive speed has
to be issued followed by a Match ROM or Search ROM command sequence. This will shorten 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 will occur on the bus as
multiple slaves transmit simultaneously (open drain pulldowns will 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 DS1996 on a multidrop bus and to simultaneously set it
in Overdrive Mode. Only the DS1996 that exactly matches the 64-bit ROM sequence will respond to the
subsequent memory function command. Slaves already in Overdrive mode from a previous Overdrive
Skip or Match command will remain in Overdrive mode. All other slaves that do not match the 64-bit
ROM sequence or do not support Overdrive will return to or remain at regular speed and wait for a reset
pulse of minimum 480 s duration. The Overdrive Match ROM command can be used with a single or
multiple devices on the bus.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS2016 | 2K X 8 STANDARD SRAM, 100 ns, PDIP24 |
| DS2118MB | 9-LINE 110 ohm SCSI BUS TERMINATOR, PDSO36 |
| DS21348GN | DATACOM, PCM TRANSCEIVER, BGA49 |
| DS21348T | DATACOM, PCM TRANSCEIVER, PQFP44 |
| DS21348TN | DATACOM, PCM TRANSCEIVER, PQFP44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1996L-F5/A18 | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)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 |
| DS1996L-F5+ | 功能描述:iButton 64Kb Memory iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)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 |
| DS-19P | 制造商:Pan Pacific 功能描述: |
| DS-19S | 制造商:Pan Pacific 功能描述: |
| DS1-A | 制造商:Sliger Designs, Inc. 功能描述:CPC CASE W/ POWER SUPPLY (SPI220LE) FANS, SWITCH ECT. - Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。