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参数资料
| 型号： | DS1685S-3+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 15/34页 |
| 文件大小： | 0K |
| 描述： | IC RTC 3V 64-BIT Y2KC 24-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 31 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，NVSRAM，方波输出，Y2K |
| 存储容量： | 242B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | 并联 |
| 电源电压： | 2.7 V ~ 3.7 V |
| 电压 - 电源，电池： | 2.5 V ~ 3.7 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 24-SOIC W |
| 包装： | 管件 |
| 产品目录页面： | 1434 (CN2011-ZH PDF) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页当前第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
DS1685/DS1687 3V/5V Real-Time Clocks
22 of 34
Extended Control Register 4B
MSB
LSB
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
ABE
E32K
CS
RCE
PRS
RIE
WIE
KSE
ABE – Auxiliary Battery Enable. This bit when written to a logic 1 enables the VBAUX pin for extended functions.
E32K – Enable 32.768kHz output. This bit when written to a logic 1 enables the 32.768kHz oscillator frequency to
be output on the SQW pin. This bit is set to a logic 1 when VCC is applied.
CS – Crystal Select Bit. When CS is set to a 0, the oscillator is configured for operation with a crystal that has a
6pF specified load capacitance. When CS = 1, the oscillator is configured for a 12.5pF crystal. CS is disabled in the
DS1687 EDIP and should be set to CS = 0.
RCE – RAM Clear-Enable bit. When set to a 1, this bit enables a low level on RCLR to clear all 242 bytes of user
RAM. When RCE = 0, RCLR and the RAM clear function are disabled.
PRS – PAB Reset-Select Bit. When set to a 0, the PWR pin is set high-Z when the DS1685 goes into power-fail.
When set to a 1, the PWR pin remains active upon entering power-fail.
RIE – Ram Clear-Interrupt Enable. When RIE is set to a 1, the IRQ pin is driven low when a RAM clear function is
completed.
WIE – Wake-Up Alarm-Interrupt Enable. When VCC voltage is absent and WIE is set to a 1, the PWR pin is driven
active-low when a wake-up condition occurs, causing the WF bit to be set to 1. When VCC is then applied, the IRQ
pin is also driven low. If WIE is set while system power is applied, both IRQ and PWR are driven low in response to
WF being set to 1. When WIE is cleared to a 0, the WF bit has no affect on the PWR or IRQ pins.
KSE – Kickstart Interrupt Enable. When VCC voltage is absent and KSE is set to a 1, the PWR pin is driven active-
low when a kickstart condition occurs (KS pulsed low), causing the KF bit to be set to 1. When VCC is then applied,
the IRQ pin is also driven low. If KSE is set to 1 while system power is applied, both IRQ and PWR are driven low in
response to KF being set to 1. When KSE is cleared to a 0, the KF bit has no affect on the PWR or IRQ pins.
SYSTEM MAINTENANCE INTERRUPT (SMI) RECOVERY STACK
An SMI recovery register stack is located in the extended register bank, locations 4Eh and 4Fh. This register stack,
shown below, can be used by the BIOS to recover from an SMI occurring during an RTC read or write.
RTC ADDRESS
RTC ADDRESS-1
4Eh
RTC ADDRESS-2
4Fh
RTC ADDRESS-3
SMI RECOVERY STACK
7
6
5
4
3
2
1
0
DV0
AD6
AD5
AD4
AD3
AD2
AD1
AD0
REGISTER BIT DEFINITION
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1685S-3/T&R | 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 |
| DS1685S-3/TR | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clocks |
| DS1685S-3_12 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:3V/5V Real-Time Clocks |
| DS1685S-3+ | 功能描述:实时时钟 3V/5V RTC 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 |
| DS1685S-3+T& | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clocks |
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