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參數(shù)資料
| 型號： | DS1500W |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC RTC Y2KC W/NV CTRL 32-DIP |
| 標準包裝： | 13 |
| 類型： | 時鐘/日歷 |
| 特點： | 警報器，閏年，NVSRAM，方波輸出，監(jiān)視計時器，Y2K |
| 存儲容量： | 256B |
| 時間格式： | HH:MM:SS（24 小時） |
| 數(shù)據(jù)格式： | YY-MM-DD-dd |
| 接口： | 并聯(lián) |
| 電源電壓： | 3 V ~ 3.6 V |
| 電壓 - 電源，電池： | 2.5 V ~ 3.7 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 32-DIP 模塊（0.600"，15.24mm） |
| 供應商設備封裝： | 32-EDIP |
| 包裝： | 管件 |
DS1500 Y2K Watchdog RTC with Nonvolatile Control
15 of 20
Control A Register (0Eh)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
BLF1
BLF2
PRS
PAB
TDF
KSF
WDF
IRQF
BLF1, Valid RAM and Time Bit 1 (0Eh Bit 7); BLF2, Valid RAM and Time Bit 2 (0Eh Bit 6)
These status bits give the condition of any batteries attached to the VBAT or VBAUX pins. The DS1500 constantly
monitors the battery voltage of the backup-battery sources (VBAT and VBAUX). The BLF1 and BLF2 bits are set to 1 if
the battery voltage on VBAT and VBAUX is less than VBLF, otherwise BLF1 and BLF2 bits are 0. BLF1 reflects the
condition of VBAT with BLF2 reflecting VBAUX. If either bit is read as 1, the voltage on the respective pin is inadequate
to maintain the RAM memory or clock functions. These bits are read only.
PRS, Reset Select Bit (0Eh Bit 5)
When set to 0, the PWR pin is set high-Z when the DS1500 goes into power-fail. When set to 1, the PWR pin
remains active upon entering power-fail.
PAB, Power Active-Bar Control Bit (0Eh Bit 4)
When this bit is 0, the PWR pin is in the active-low state. When this bit is 1, the PWR pin is in the high-impedance
state. The user can write this bit to 1 or 0. If either TDF AND TPE = 1 or KSF = 1, the PAB bit is cleared to 0. This
bit can be read or written.
TDF, Time-of-Day/Date Alarm Flag (0Eh Bit 3)
A 1 in the TDF bit indicates that the current time has matched the alarm time. If the TIE bit is also 1, the IRQ pin
goes low and a 1 appears in the IRQF bit. This bit is cleared by reading the register or writing it to 0.
KSF, Kickstart Flag (0Eh Bit 2)
This bit is set to 1 when a kickstart condition occurs or when the user writes it to 1. If the KIE bit is also 1, the IRQ
pin goes low and a 1 appears in the IRQF bit. This bit is cleared by reading the register or writing it to 0.
WDF, Watchdog Flag (0Eh Bit 1)
If the processor does not access the DS1500 with a write within the period specified in addresses 0Ch and 0Dh,
the WDF bit is set to 1. WDF is cleared by writing it to 0.
IRQF, Interrupt Request Flag (0Eh Bit 0)
The interrupt request flag (IRQF) bit is set to 1 when one or more of the following are true:
TDF = TIE = 1
KSF = KIE = 1
WDF = WDE = 1
i.e., IRQF = (TDF x TIE) + (KSF x KIE) + (WDF x WDE)
Any time the IRQF bit is 1, the IRQ pin is driven low.
Clearing IRQ and Flags
The time-of-day/date alarm flag (TDF), watchdog flag (WDF), kickstart flag (KSF) and interrupt request flag (IRQF)
are cleared by reading the flag register (0Eh). The address must be stable for a minimum of 15ns while CS and OE
are active. After the address stable requirement has been met, either a change in address, a rising edge of OE, or
a rising edge of CS causes the flags to be cleared. The IRQ pin goes inactive after the IRQF flag is cleared. TDF
and WDF can also be cleared by writing to 0.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS1500WE | 功能描述:實時時鐘 RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量: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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1500WE+ | 功能描述:實時時鐘 Y2K-Compliant Watchdog RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量: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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1500WEN | 功能描述:IC RTC Y2KC W/NV CTRL 32-TSOP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 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 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應商設備封裝:8-TDFN EP 包裝:管件 |
| DS1500WEN+ | 功能描述:實時時鐘 Y2K-Compliant Watchdog RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時間格式:HH:MM:SS RTC 存儲容量: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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1500WN | 功能描述:IC RTC Y2KC W/NV CTRL 32-DIP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 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 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應商設備封裝:8-TDFN EP 包裝:管件 |
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