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参数资料
| 型号： | DS1251Y |
| 厂商： | Maxim Integrated Products, Inc. |
| 英文描述： | 4096K NV SRAM with Phantom Clock(带幻影时钟的4096K NV 静态RAM) |
| 中文描述： | 4096K非易失SRAM与幻影时钟（带幻影时钟的4096K非易失静态RAM）的 |
| 文件页数： | 3/12页 |
| 文件大小： | 90K |
| 代理商： | DS1251Y |
DS1251Y
022798 3/12
PHANTOM CLOCK
REGISTER INFORMATION
The Phantom Clock information is contained in eight
registers of 8–bits, each of which is sequentially ac-
cessed one bit at a time after the 64–bit pattern recogni-
tion sequence has been completed. When updating the
Phantom Clock registers, each register must be han-
dled in groups of 8–bits. Writing and reading individual
bits within 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 eight 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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1251Y-120 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:4096K NV SRAM with Phantom Clock |
| DS1251Y-150 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS1251Y-70 | 功能描述:实时时钟 4096K NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1251Y-70+ | 功能描述:实时时钟 4096K NV SRAM w/Phantom Clock RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| DS1251YP | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:4096k NV SRAM with Phantom Clock |
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