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參數(shù)資料
| 型號： | DS1305EN |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Timer or RTC |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
| 封裝： | 4.40 MM, TSSOP-20 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 231K |
| 代理商： | DS1305EN |
DS1305
3 of 18
SIGNAL DESCRIPTIONS
VCC1 - DC power is provided to the device on this pin. VCC1 is the primary power supply.
VCC2 - This is the secondary power supply pin. In systems using the trickle charger, the rechargeable
energy source is connected to this pin.
VBAT - Battery input for any standard 3-volt lithium cell or other energy source.
VCCIF (Interface Logic Power Supply Input) - The VCCIF pin allows the DS1305 to drive SDO and PF
output pins to a level that is compatible with the interface logic, thus allowing an easy interface to 3-volt
logic in mixed supply systems. This pin is physically connected to the source connection of the p-channel
transistors in the output buffers of the SDO and PF pins.
SERMODE (Serial Interface Mode Input) - The SERMODE pin offers the flexibility to choose
between two serial interface modes.
When connected to GND, standard 3-wire communication is
selected. When connected to VCC, Motorola SPI communication is selected.
SCLK (Serial Clock Input) - SCLK is used to synchronize data movement on the serial interface for
either the SPI or 3-wire interface.
SDI (Serial Data Input) - When SPI communication is selected, the SDI pin is the serial data input for
the SPI bus. When 3-wire communication is selected, this pin must be tied to the SDO pin (the SDI and
SDO pins function as a single I/O pin when tied together).
SDO (Serial Data Output) - When SPI communication is selected, the SDO pin is the serial data output
for the SPI bus. When 3-wire communication is selected, this pin must be tied to the SDI pin (the SDI
and SDO pins function as a single I/O pin when tied together). VCCIF provides the logic high level.
CE (Chip Enable) - The Chip Enable signal must be asserted high during a read or a write for both
3-wire and SPI communication. This pin has an internal 55k pull-down resistor (typical).
INT0
(Interrupt 0 Output) - The INT0 pin is an active low output of the DS1305 that can be used as an
interrupt input to a processor. The INT0 pin can be programmed to be asserted by only Alarm 0 or can be
programmed to be asserted by either Alarm 0 or Alarm 1. The INT0 pin remains low as long as the status
bit causing the interrupt is present and the corresponding interrupt enable bit is set. The INT0 pin
operates when the DS1305 is powered by VCC1, VCC2, or VBAT. The INT0 pin is an open drain output and
requires an external pull-up resistor.
INT1
(Interrupt 1 Output) - The INT1 pin is an active low output of the DS1305 that can be used as an
interrupt input to a processor. The INT1 pin can be programmed to be asserted by Alarm 1 only. The
INT1
pin remains low as long as the status bit causing the interrupt is present and the corresponding
interrupt enable bit is set. The INT1 pin operates when the DS1305 is powered by VCC1, VCC2, or VBAT.
The INT1 pin is an open drain output and requires an external pull-up resistor.
Both INT0 and INT1 are open drain outputs. The two interrupts and the internal clock continue to run
regardless of the level of VCC (as long as a power source is present).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1305 | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
| DS1305N | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
| DS1305E | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
| DS1306N | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
| DS1306 | 0 TIMER(S), REAL TIME CLOCK, PDIP16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1305EN/R | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Serial Alarm Real-Time Clock |
| DS1305EN/T | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Serial Alarm Real-Time Clock |
| DS1305EN/T&R | 制造商:Maxim Integrated Products 功能描述:SERIAL ALARM RTC 20P TSSOP IND T&R - 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 SERIAL ALARM IND 20-TSSOP 制造商:Maxim Integrated Products 功能描述:IC RTC YY-MM-DD 96 X 8 TSS 制造商:Maxim Integrated Products 功能描述:Real Time Clock Serial Alarm RTC 3-Wire |
| DS1305EN/T&R | 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 |
| DS1305EN/TR | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Serial Alarm Real-Time Clock |
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