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參數(shù)資料
| 型號(hào)： | DS1248Y |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Using the Dallas Phantom Real Time Clocks(帶幻象實(shí)時(shí)時(shí)鐘的NVSRAM) |
| 中文描述： | 使用達(dá)拉斯幻影實(shí)時(shí)時(shí)鐘（帶幻象實(shí)時(shí)時(shí)鐘的非易失性SRAM） |
| 文件頁(yè)數(shù)： | 3/12頁(yè) |
| 文件大?。?/td> | 91K |
| 代理商： | DS1248Y |
DS1248Y
022798 3/12
PHANTOM CLOCK
REGISTER INFORMATION
The Phantom Clock information is contained in 8 regis-
ters of 8 bits, each of which is sequentially accessed one
bit at a time after the 64–bit pattern recognition se-
quence has been completed. When updating the Phan-
tom Clock registers, each register must be handled in
groups of 8 bits. Writing and reading individual bits with-
in a register could produce erroneous results. These
read/write registers are defined in Figure 2.
Data contained in the Phantom Clock register is in
binary coded decimal format (BCD). Reading and writ-
ing the registers is always accomplished by stepping
through all 8 registers, starting with bit 0 of register 0 and
ending with bit 7 of register 7.
PHANTOM CLOCK REGISTER DEFINITION
Figure 1
7
6
5
4
3
2
1
0
1
1
0
0
0
1
0
1
0
0
1
1
1
0
1
0
1
0
1
0
0
0
1
1
0
1
0
1
1
1
0
0
1
1
0
0
0
1
0
1
0
0
1
1
1
0
1
0
1
0
1
0
0
0
1
1
0
1
0
1
1
1
0
0
C5
3A
A3
5C
C5
3A
A3
5C
BYTE 0
BYTE 1
BYTE 2
BYTE 3
BYTE 4
BYTE 5
BYTE 6
BYTE 7
HEX
VALUE
NOTE:
The pattern recognition in Hex is C5, 3A, A3, 5C, C5, 3A, A3, 5C. The odds of this pattern being accidentally dupli-
cated and causing inadvertent entry to the Phantom Clock is less than 1 in 10
19
. This pattern is sent to the Phantom
Clock LSB to MSB.
相關(guān)PDF資料 |
PDF描述 |
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| DS1249AB | 2048K Nonvolatile SRAM(2048K 非易失性靜態(tài)RAM) |
| DS1249Y | 2048K Nonvolatile SRAM(2048K 非易失性靜態(tài)RAM) |
| DS1267 | Dual Digital Potentiometer Chip(雙路數(shù)字電位器芯片) |
| DS1280 | 3-Wire to Bytewide Converter Chip(3線(xiàn)至字節(jié)寬度（8位）轉(zhuǎn)換芯片) |
| DS1284 | Watchdog Timekeeper Chip(看門(mén)狗計(jì)時(shí)器芯片) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1248Y-100IND | 功能描述:IC NVSRAM 1MBIT 100NS 32DIP RoHS:否 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 實(shí)時(shí)時(shí)鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:時(shí)鐘/日歷 特點(diǎn):警報(bào)器，閏年，SRAM 存儲(chǔ)容量:- 時(shí)間格式:HH:MM:SS（12/24 小時(shí)） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件 |
| DS1248Y-120 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS1248Y-200 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS1248Y-70 | 功能描述:實(shí)時(shí)時(shí)鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1248Y-70+ | 功能描述:實(shí)時(shí)時(shí)鐘 1024k NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線(xiàn)接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
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