参数资料
| 型号： | DS3231S# |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/20页 |
| 文件大小： | 0K |
| 描述： | IC RTC W/TCXO 16-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 45 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，方波输出，TCXO/晶体 |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | I²C，2 线串口 |
| 电源电压： | 2.3 V ~ 5.5 V |
| 电压 - 电源，电池： | 2.3 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 16-SOIC W |
| 包装： | 管件 |
| 产品目录页面： | 1434 (CN2011-ZH PDF) |
Extremely Accurate I2C-Integrated
RTC/TCXO/Crystal
Maxim Integrated
13
DS3231
Special-Purpose Registers
The DS3231 has two additional registers (control and
status) that control the real-time clock, alarms, and
square-wave output.
Control Register (0Eh)
Bit 7: Enable Oscillator (
EOSC). When set to logic 0,
the oscillator is started. When set to logic 1, the oscilla-
tor is stopped when the DS3231 switches to VBAT. This
bit is clear (logic 0) when power is first applied. When
the DS3231 is powered by VCC, the oscillator is always
on regardless of the status of the
EOSC bit. When
EOSC is disabled, all register data is static.
Bit 6: Battery-Backed Square-Wave Enable
(BBSQW). When set to logic 1 with INTCN = 0 and VCC
< VPF, this bit enables the square wave. When BBSQW
is logic 0, the
INT/SQW pin goes high impedance when
VCC < VPF. This bit is disabled (logic 0) when power is
first applied.
Bit 5: Convert Temperature (CONV). Setting this bit to
1 forces the temperature sensor to convert the temper-
ature into digital code and execute the TCXO algorithm
to update the capacitance array to the oscillator. This
can only happen when a conversion is not already in
progress. The user should check the status bit BSY
before forcing the controller to start a new TCXO exe-
cution. A user-initiated temperature conversion does
not affect the internal 64-second update cycle.
A user-initiated temperature conversion does not affect
the BSY bit for approximately 2ms. The CONV bit
remains at a 1 from the time it is written until the conver-
sion is finished, at which time both CONV and BSY go
to 0. The CONV bit should be used when monitoring
the status of a user-initiated conversion.
Bits 4 and 3: Rate Select (RS2 and RS1). These bits
control the frequency of the square-wave output when
the square wave has been enabled. The following table
shows the square-wave frequencies that can be select-
ed with the RS bits. These bits are both set to logic 1
(8.192kHz) when power is first applied.
Bit 2: Interrupt Control (INTCN). This bit controls the
INT/SQW signal. When the INTCN bit is set to logic 0, a
square wave is output on the
INT/SQW pin. When the
INTCN bit is set to logic 1, then a match between the
timekeeping registers and either of the alarm registers
activates the
INT/SQW output (if the alarm is also
enabled). The corresponding alarm flag is always set
regardless of the state of the INTCN bit. The INTCN bit
is set to logic 1 when power is first applied.
Bit 1: Alarm 2 Interrupt Enable (A2IE). When set to
logic 1, this bit permits the alarm 2 flag (A2F) bit in the
status register to assert
INT/SQW (when INTCN = 1).
When the A2IE bit is set to logic 0 or INTCN is set to
logic 0, the A2F bit does not initiate an interrupt signal.
The A2IE bit is disabled (logic 0) when power is first
applied.
Bit 0: Alarm 1 Interrupt Enable (A1IE). When set to
logic 1, this bit permits the alarm 1 flag (A1F) bit in the
status register to assert
INT/SQW (when INTCN = 1).
When the A1IE bit is set to logic 0 or INTCN is set to
logic 0, the A1F bit does not initiate the
INT/SQW sig-
nal. The A1IE bit is disabled (logic 0) when power is
first applied.
RS2
RS1
SQUARE-WAVE OUTPUT
FREQUENCY
0
1Hz
0
1
1.024kHz
1
0
4.096kHz
1
8.192kHz
SQUARE-WAVE OUTPUT FREQUENCY
Control Register (0Eh)
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
NAME:
EOSC
BBSQW
CONV
RS2
RS1
INTCN
A2IE
A1IE
POR:
0
1
0
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相关代理商/技术参数 |
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| DS3231S# | 功能描述:实时时钟 Integrated RTC/TCXO/Crystal 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 |
| DS3231S#T&R | 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 16SOIC W - Tape and Reel 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 16SOIC W - Cut TR (SOS) 制造商:Maxim Integrated Products 功能描述:IC RTC W/TCXO 16-SOIC 制造商:Maxim Integrated Products 功能描述:Real Time Clock Integrated RTC/TCXO/Crystal |
| DS3231S#T&R | 功能描述:实时时钟 Integrated RTC/TCXO/Crystal 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 |
| DS3231S#-W | 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 |
| DS3231S/T&R | 制造商:Maxim Integrated Products 功能描述:I2C-INTEGRATED RTC/TCXO/CRYSTAL SOIC16 - Tape and Reel 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC RTC W/TCXO 16SOIC 制造商:Maxim Integrated Products 功能描述:Real Time Clock Integrated RTC/TCXO/Crystal |
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