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參數(shù)資料
| 型號(hào)： | DS1308 |
| 英文描述： | 64 X 8 Serial Real Time Clock |
| 中文描述： | 64 × 8串行實(shí)時(shí)時(shí)鐘 |
| 文件頁(yè)數(shù)： | 5/14頁(yè) |
| 文件大?。?/td> | 225K |
| 代理商： | DS1308 |
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DS1307/1308
5 of 14
CONTROL REGISTER
The DS1307/DS1308 Control Register is used to control the operation of the SQW/OUT pin.
BIT 7
OUT
BIT 6
X
BIT 5
X
BIT 4
SQWE
BIT 3
X
BIT 2
X
BIT 1
RS1
BIT 0
RS0
OUT (Output control): This bit 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 and is 0 if OUT=0.
SQWE (Square Wave Enable): This bit, when set to a logic 1, will enable the oscillator output. The
frequency of the square wave output depends upon the value of the RS0 and RS1 bits.
RS (Rate Select): These bits control the frequency of the square wave output when the square wave
output has been enabled. Table 1 lists the square wave frequencies that can be selected with the RS bits.
SQUAREWAVE OUTPUT FREQUENCY
Table 1
RS1
RS0
SQW OUTPUT
FREQUENCY
1 Hz
4.096 kHz
8.192 kHz
32.768 kHz
0
0
1
1
0
1
0
1
2-WIRE SERIAL DATA BUS
The DS1307 supports a bi-directional 2-wire bus and data transmission protocol. A device that sends
data onto the bus is defined as a transmitter and a device receiving data as a receiver. The device that
controls the message is called a master. The devices that are controlled by the master are referred to as
slaves. The bus must be controlled by a master device which generates the serial clock (SCL), controls
the bus access, and generates the START and STOP conditions. The DS1307/DS1308 operates as a slave
on the 2-wire bus. A typical bus configuration using this 2-wire protocol is show in Figure 4.
TYPICAL 2-WIRE BUS CONFIGURATION
Figure 4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1308N | 64 X 8 Serial Real Time Clock |
| DS1543 | 64k NV Timekeeping RAM |
| DS1543-100 | 64k NV Timekeeping RAM |
| DS1543-70 | 64k NV Timekeeping RAM |
| DS1543W-100 | 64k NV Timekeeping RAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1308N | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:64 X 8 Serial Real Time Clock |
| DS1308U-18 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Current I2C RTC with 56-Byte NV RAM |
| DS1308U-18+ | 功能描述:實(shí)時(shí)時(shí)鐘 LOW CUR 1.8V I2C RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1308U-18+T | 功能描述:實(shí)時(shí)時(shí)鐘 LOW CUR 1.8V I2C RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲(chǔ)容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| DS1308U-3 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Low-Current I2C RTC with 56-Byte NV RAM |
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