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參數(shù)資料
| 型號： | DS1305 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
| 封裝： | 0.300 INCH, DIP-16 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大?。?/td> | 231K |
| 代理商： | DS1305 |
DS1305
4 of 18
PF
(Power Fail Output) - The PF pin is used to indicate loss of the primary power supply (VCC1).
When VCC1 is less than VCC2 or is less than VBAT, the PF pin will be driven low. VCCIF provides the logic
high level.
X1, X2 - Connections for a standard 32.768 kHz quartz crystal. The internal oscillator is designed for
operation with a crystal having a specified load capacitance of 6 pF. For more information on crystal
selection and crystal layout considerations, please consult Application Note 58, “Crystal Considerations
with Dallas Real Time Clocks.” The DS1305 can also be driven by an external 32.768 kHz oscillator. In
this configuration, the X1 pin is connected to the external oscillator signal and the X2 pin is floated.
CLOCK, CALENDAR AND ALARM
The time and calendar information is obtained by reading the appropriate register bytes. The real time
clock registers and user RAM locations are illustrated in Figure 2. The time, calendar and alarm are set
or initialized by writing the appropriate register bytes. Note that some bits are set to zero. These bits will
always read 0 regardless of how they are written. Also note that registers 12h to 1 Fh (read) and registers
92h to 9 Fh are reserved. These registers will always read 0 regardless of how they are written. The
contents of the time, calendar and alarm registers are in the binary-coded decimal (BCD) format.
Please note that the initial power on state of all registers in not defined. Therefore it is important to
enable the oscillator (EOSC = 0) and disable write protect (WP = 0) during initial configuration.
RTC REGISTERS AND ADDRESS MAP Figure 2
HEX ADDRESS
READ
WRITE
Bit
7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
RANGE
00H
80H
0
10 SEC
SEC
00-59
01H
81H
0
10 MIN
MIN
00-59
12
10
01-12 + P/A
02H
82H
0
24
P/A
10 HR
HOURS
00-23
03H
83H
0
DAY
01-07
04H
84H
0
10 DATE
DATE
1-31
05H
85H
0
10 MONTH
MONTH
01-12
06H
86H
10 YEAR
YEAR
00-99
07H
87H
M
10 SEC ALARM 0
SEC ALARM 0
00-59
08H
88H
M
10 MIN ALARM 0
MIN ALARM 0
00-59
12
10
01-12 + P/A
09H
89H
M
24
P/A
10 HR
HOUR ALARM 0
00-23
0AH
8AH
M
0
DAY ALARM 0
01-07
0BH
8BH
M
10 SEC ALARM 1
SEC ALARM 1
00-59
0CH
8CH
M
10 MIN ALARM 1
MIN ALARM 1
00-59
12
10
01-12 + P/A
0DH
8DH
M
24
P/A
10 HR
HOUR ALARM 1
00-23
0EH
8EH
M
0
DAY ALARM 1
01-07
0FH
8FH
CONTROL REGISTER
10H
90H
STATUS REGISTER
11H
91H
TRICKLE CHARGER REGISTER
12-1FH
92-9FH
RESERVED
20-7FH
A0-FFH
96 BYTES USER RAM
Range For Alarm Registers Does Not Include Mask’m’ Bits.
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| DS1305N | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1305_05 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Serial Alarm Real-Time Clock |
| DS1305+ | 功能描述:實時時鐘 Serial Alarm RTC 3-Wire 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS1305E | 功能描述:實時時鐘 Serial Alarm RTC 3-Wire 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 時間格式:HH:MM:SS RTC 存儲容量: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 |
| DS1305E/R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Serial Alarm Real-Time Clock |
| DS1305E/T | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Serial Alarm Real-Time Clock |
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