參數(shù)資料
型號(hào)： DS1687-5+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 5/34頁(yè)
文件大小： 0K
描述： IC RTC 5V 64-BIT Y2K 24-EDIP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 14
類型： 時(shí)鐘/日歷
特點(diǎn)： 警報(bào)器，NVSRAM，方波輸出，Y2K
存儲(chǔ)容量： 242B
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： 并聯(lián)
電源電壓： 4.5 V ~ 5.5 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： 24-DIP 模塊（0.600"，15.24mm）
供應(yīng)商設(shè)備封裝： 24-EDIP
包裝： 管件
產(chǎn)品目錄頁(yè)面： 1434 (CN2011-ZH PDF)
DS1685/DS1687 3V/5V Real-Time Clocks
13 of 34
Register C (0Ch)
MSB
10B
LSB
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
IQRF
PF
AF
UF
0
IRQF – The interrupt-request flag (IRQF) bit is set to a 1 when one or more of the following are true:
PF = PIE = 1
WF = WIE = 1
AF = AIE = 1
KF = KSE = 1
UF = UIE = 1
RF = RIE = 1
Any time the IRQF bit is a 1, the IRQ pin is driven low. Flag bits PF, AF, and UF are cleared after Register C is read
by the program.
PF – The periodic-interrupt flag (PF) is a read-only bit that is set to a 1 when an edge is detected on the selected
tap of the divider chain. The RS3–RS0 bits establish the periodic rate. PF is set to a 1 independently of the state of
the PIE bit. When both PF and PIE are 1’s, the IRQ signal is active and sets the IRQF bit. This bit may be cleared
by reading Register C.
AF – A 1 in the alarm-interrupt flag (AF) bit indicates that the current time has matched the alarm time. If the AIE bit
is also a 1, the IRQ pin goes low and a 1 appears in the IRQF bit. This bit may be cleared by reading Register C.
UF – The update-ended interrupt flag (UF) bit is set after each update cycle. When the UIE bit is set to 1, the one in
UF causes the IRQF bit to be a 1, which asserts the IRQ pin. This bit may be cleared by reading Register C.
BIT 3, BIT2, BIT 1, BIT 0 - These are unused bits of the status Register C. These bits always read 0 and cannot be
written.
Register D (0Dh)
MSB
LSB
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
VRT
0
VRT – The valid RAM and time (VRT) bit indicates the condition of the battery connected to the VBAT pin or the
battery connected to VBAUX, whichever is at a higher voltage. This bit is not writable and should always be a 1 when
read. If a 0 is ever present, an exhausted lithium energy source is indicated and both the contents of the RTC data
and RAM data are questionable.
BIT 6, BIT 5, BIT 4, BIT 3, BIT 2, BIT 1, BIT 0 – The remaining bits of Register D are not usable. They cannot be
written and when read will always read 0.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS1687-5_12 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:3V/5V Real-Time Clocks
DS1687-5+ 功能描述:實(shí)時(shí)時(shí)鐘 3V/5V RTC 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(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
DS1687-5+ 制造商:Maxim Integrated Products 功能描述:IC RTC YYYY-MM-DD 242 X 8
DS1687-5IND 功能描述:實(shí)時(shí)時(shí)鐘 3V/5V RTC 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(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
DS1687-5IND_12 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:3V/5V Real-Time Clocks
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