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参数资料
| 型号： | DS1556-70 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Timer or RTC |
| 英文描述： | REAL TIME CLOCK, PDMA32 |
| 封装： | EDIP MODULE-32 |
| 文件页数： | 20/23页 |
| 文件大小： | 443K |
| 代理商： | DS1556-70 |
DS1556 1M, Nonvolatile, Y2K-Compliant Timekeeping RAM
6 of 21
CLOCK OPERATIONS
Table 2 and the following paragraphs describe the operation of RTC, alarm, and watchdog functions.
Table 2. Register Map
DATA
ADDRESS
B7
B6
B5
B4
B3
B2
B1
B0
FUNCTION
RANGE
1FFFFh
10 Year
Year
00-99
1FFFEh
X
10
Month
01-12
1FFFDh
X
10 Date
Date
01-31
1FFFCh
X
Ft
X
Day
01-07
1FFFBh
X
10 Hour
Hour
00-23
1FFFAh
X
10 Minutes
Minutes
00-59
1FFF9h
OSC
10 Seconds
Seconds
00-59
1FFF8h
W
R
10 Century
Century
Control
00-39
1FFF7h
WDS
BMB4
BMB3
BMB2
BMB1
BMB0
RB1
RB0
Watchdog
1FFF6h
AE
Y
ABE
Y
Interrupts
1FFF5h
AM4
Y
10 Date
Date
Alarm Date
01-31
1FFF4h
AM3
Y
10 Hours
Hours
Alarm Hours
00-23
1FFF3h
AM2
10 Minutes
Minutes
Alarm Minutes
00-59
1FFF2h
AM1
10 Seconds
Seconds
Alarm Seconds
00-59
1FFF1h
Y
Unused
1FFF0h
WF
AF
0
BLF
0
Flags
X = Unused, Read/Writable Under Write and Read Bit Control
AE = Alarm Flag Enable
Y = Unused, Read/Writable Without Write and Read Bit Control
ABE = Alarm in Battery-Backup Mode Enable
FT = Frequency Test Bit
AM1 to AM4 = Alarm Mask Bits
OSC = Oscillator Start/Stop Bit
WF = Watchdog Flag
W = Write Bit
AF = Alarm Flag
R = Read Bit
0 = 0 (Read Only)
WDS = Watchdog Steering Bit
BLF = Battery Low Flag
BMB0 to BMB4 = Watchdog Multiplier Bits
RB0 to RB1 = Watchdog Resolution Bits
CLOCK OSCILLATOR CONTROL
The clock oscillator can be stopped at any time. To increase the shelf life of the backup lithium battery
source, the oscillator can be turned off to minimize current drain from the battery. The
OSC bit is the
MSB of the Seconds Register (B7 of 1FFF9h). Setting it to a 1 stops the oscillator, setting to a 0 starts the
oscillator. The DS1556 is shipped from Dallas Semiconductor with the clock oscillator turned off,
OSC
bit set to a 1.
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| DS1556W-120 | REAL TIME CLOCK, DMA32 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1556-70+ | 功能描述:实时时钟 1M NV RAM Timekeeper 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 |
| DS1556-70IND | 功能描述:实时时钟 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 |
| DS1556-70IND+ | 功能描述:实时时钟 1M NV RAM Timekeeper 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 |
| DS1556-70-W | 功能描述:实时时钟 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 |
| DS1556P | 制造商:未知厂家 制造商全称:未知厂家 功能描述:1MEG NV Y2KC Real Time Clocks RAM |
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