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参数资料
| 型号： | DS17885N-3 |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | XO, clock |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDIP24 |
| 封装： | DIP-24 |
| 文件页数： | 15/38页 |
| 文件大小： | 410K |
| 代理商： | DS17885N-3 |
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DS17885/DS17887
22 of 38
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. E32k is set to a 1 when VCC is powered up.
CS – Crystal Select. 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 DS17887 module and should be set to CS = 0.
RCE – RAM Clear Enable. When set to a 1, this bit enables a low level on RCLR to clear all 114 bytes
of user RAM. When RCE = 0, RCLR and the RAM clear function are disabled.
PRS – PAB Reset Select. When set to a 0, the PWR pin is set high-z when the DS17885 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.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS17885N-5 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:3V/5V Real-Time Clock |
| DS17885S-3 | 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 |
| DS17885S-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 |
| DS17885S-5 | 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 |
| DS17885S-5/T&R+ | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK MULTIPLEXED 8KBYTE 24SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC RTC 5V 8K NV RAM 24-SOIC |
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