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参数资料
| 型号： | DS12CR887-33 |
| 英文描述： | RTC with Constant-Voltage Trickle Charger |
| 中文描述： | 时钟与恒压涓流充电器 |
| 文件页数： | 18/22页 |
| 文件大小： | 1093K |
| 代理商： | DS12CR887-33 |
D
RTC with Constant-Voltage Trickle Charger
18
____________________________________________________________________
Bit 7: Interrupt Request Flag (IRQF).
This bit is set to
1 when any of the following are true:
PF = PIE = 1
AF = AIE = 1
UF = UIE = 1
Any time the IRQF bit is 1, the
IRQ
pin is driven low.
This bit can be cleared by reading Register C or with a
RESET
.
Bit 6: Periodic Interrupt Flag (PF).
This bit is read-
only and is set to 1 when an edge is detected on the
selected tap of the divider chain. The RS3 through RS0
bits establish the periodic rate. PF is set to 1 indepen-
dent of the state of the PIE bit. When both PF and PIE
are 1s, the
IRQ
signal is active and sets the IRQF bit.
This bit can be cleared by reading Register C or with a
RESET
.
Bit 5: Alarm Interrupt Flag (AF).
A 1 in the AF bit indi-
cates that the current time has matched the alarm time.
If the AIE bit is also 1, the
IRQ
pin goes low and a 1
appears in the IRQF bit. This bit can be cleared by
reading Register C or with a
RESET
.
Bit 5: Update-Ended Interrupt Flag (UF).
This bit is
set after each update cycle. When the UIE bit is set to
1, the 1 in UF causes the IRQF bit to be a 1, which
asserts the
IRQ
pin. This bit can be cleared by reading
Register C or with a
RESET
.
Bits 3 to 0: Unused.
These bits are unused in Register
C. These bits always read 0 and cannot be written.
BIT 7
IRQF
BIT 6
PF
BIT 5
AF
BIT 4
UF
BIT 3
0
BIT 2
0
BIT 1
0
BIT 0
0
Control Register C
BIT 7
VRT
BIT 6
0
BIT 5
0
BIT 4
0
BIT 3
0
BIT 2
0
BIT 1
0
BIT 0
0
Control Register D
Bit 7: Valid RAM and Time (VRT).
This bit indicates
the condition of the battery connected to the V
BACKUP
pin. This bit is not writeable and should always be 1
when read. If a 0 is ever present, an exhausted internal
lithium energy source is indicated and both the con-
tents of the RTC data and RAM data are questionable.
This bit is unaffected by
RESET
.
Bits 6 to 0: Unused.
The remaining bits of Register D
are not usable. They cannot be written and they always
read 0.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS12CR887-33+ | 功能描述:实时时钟 RTC w/Constant V Trickle Charger 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 |
| DS12CR887-5 | 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 |
| DS12CR887-5+ | 功能描述:实时时钟 RTC w/Constant V Trickle Charger 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 |
| DS12R885-33 | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK MULTIPLEXED 114BYTE - Bulk |
| DS12R885-5 | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK MULTIPLEXED 114BYTE - Bulk |
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