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参数资料
| 型号： | DS1338Z-33+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC RTC 56BYTE NV RAM 3.3V 8SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 类型： | 时钟/日历 |
| 特点： | 闰年，NVSRAM，方波输出 |
| 存储容量： | 56B |
| 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： | 3 V ~ 5.5 V |
| 电压 - 电源，电池： | 1.3 V ~ 3.7 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 标准包装 |
| 其它名称： | DS1338Z-33+T&RDKR |
DS1338 I2C RTC with 56-Byte NV RAM
11 of 16
CONTROL REGISTER (07H)
The control register controls the operation of the SQW/OUT pin and provides oscillator status.
Bit #
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Name
OUT
0
OSF
SQWE
0
RS1
RS0
POR
1
0
1
0
1
Bit 7: Output Control (OUT). Controls the output level of the SQW/OUT pin when the square-wave output is
disabled. If SQWE = 0, the logic level on the SQW/OUT pin is 1 if OUT = 1; it is 0 if OUT = 0.
Bit 5: Oscillator Stop Flag (OSF). A logic 1 in this bit indicates that the oscillator has stopped or was stopped for
some time period and can be used to judge the validity of the clock and calendar data. This bit is edge triggered,
and is set to logic 1 when the internal circuitry senses the oscillator has transitioned from a normal run state to a
STOP condition. The following are examples of conditions that may cause the OSF bit to be set:
1) The first time power is applied.
2) The voltage present on VCC and VBAT are insufficient to support oscillation.
3) The CH bit is set to 1, disabling the oscillator.
4) External influences on the crystal (i.e., noise, leakage, etc.).
This bit remains at logic 1 until written to logic 0. This bit can only be written to logic 0. Attempting to write OSF to
logic 1 leaves the value unchanged.
Bit 4: Square-Wave Enable (SQWE). When set to logic 1, this bit enables the oscillator output to operate with
either VCC or VBAT applied. The frequency of the square-wave output depends upon the value of the RS0 and RS1
bits.
Bits 1 and 0: Rate Select (RS1 and RS0). These bits control the frequency of the square-wave output when the
square-wave output has been enabled. The table below lists the square-wave frequencies that can be selected
with the RS bits.
Square-Wave Output
OUT
RS1
RS0
SQW OUTPUT
SQWE
X
0
1Hz
1
X
0
1
4.096kHz
1
X
1
0
8.192kHz
1
X
1
32.768kHz
1
0
X
0
1
X
1
0
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相关代理商/技术参数 |
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|---|---|
| DS1339 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:I2C Serial Real-Time Clock |
| DS1339_06 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:I2C Serial Real-Time Clock |
| DS1339_11 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:I2C Serial Real-Time Clock Trickle-Charge Capability |
| DS1339A | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Current, I2C, Serial Real-Time Clock |
| DS1339A_13 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Low-Current, I2C, Serial Real-Time Clock |
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