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参数资料
| 型号： | DS1305EN/T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 20/22页 |
| 文件大小： | 0K |
| 描述： | IC RTC SERIAL ALARM IND 20-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，NVSRAM，涓流充电器 |
| 存储容量： | 96B |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | SPI |
| 电源电压： | 2 V ~ 5.5 V |
| 电压 - 电源，电池： | 2 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 20-TSSOP |
| 包装： | 带卷 (TR) |
DS1305
7 of 22
hour, and minute alarm registers is set to a logic 1. When bit 7 of the day, hour, minute, and seconds
alarm registers is set to a logic 1, alarm occurs every second.
During each clock update, the RTC compares the Alarm 0 and Alarm 1 registers with the corresponding
clock registers. When a match occurs, the corresponding alarm flag bit in the status register is set to a 1. If
the corresponding alarm interrupt enable bit is enabled, an interrupt output is activated.
Table 2. TIME-OF-DAY ALARM MASK BITS
ALARM REGISTER MASK BITS (BIT 7)
SECONDS
MINUTES
HOURS
DAYS
FUNCTION
1
Alarm once per second
0
1
Alarm when seconds match
0
1
Alarm when minutes and seconds match
0
1
Alarm hours, minutes, and seconds match
0
Alarm day, hours, minutes and seconds match
SPECIAL PURPOSE REGISTERS
The DS1305 has three additional registers (control register, status register, and trickle charger register)
that control the RTC, interrupts, and trickle charger.
CONTROL REGISTER (READ 0Fh, WRITE 8Fh)
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
EOSC
WP
0
INTCN
AIE1
AIEO
EOSC
(Enable Oscillator) – This bit when set to logic 0 starts the oscillator. When this bit is set to a
logic 1, the oscillator is stopped and the DS1305 is placed into a low-power standby mode with a current
drain of less than 100nA when power is supplied by VBAT or VCC2. On initial application of power, this bit
will be set to a logic 1.
WP (Write Protect) – Before any write operation to the clock or RAM, this bit must be logic 0. When
high, the write protect bit prevents a write operation to any register, including bits 0, 1, 2, and 7 of the
control register. Upon initial power-up, the state of the WP bit is undefined. Therefore, the WP bit should
be cleared before attempting to write to the device.
INTCN (Interrupt Control) – This bit controls the relationship between the two time-of-day alarms and
the interrupt output pins. When the INTCN bit is set to a logic 1, a match between the timekeeping
registers and the Alarm 0 registers activates the INT0 pin (provided that the alarm is enabled) and a
match between the timekeeping registers and the Alarm 1 registers activate the INT1 pin (provided that
the alarm is enabled). When the INTCN bit is set to a logic 0, a match between the timekeeping registers
and either Alarm 0 or Alarm 1 activate the INT0 pin (provided that the alarms are enabled). INT1 has no
function when INTCN is set to a logic 0.
AIE0 (Alarm Interrupt Enable 0) – When set to a logic 1, this bit permits the interrupt 0 request flag
(IRQF0) bit in the status register to assert INT0 . When the AIE0 bit is set to logic 0, the IRQF0 bit does
not initiate the INT0 signal.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1305N | 功能描述:实时时钟 Serial Alarm RTC 3-Wire 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 |
| DS1305N+ | 功能描述:实时时钟 Serial Alarm RTC 3-Wire 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 |
| DS1305Z | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Serial Alarm Real-Time Clock(287.74 k) |
| DS1306 | 功能描述:实时时钟 Serial Alarm RTC 3-Wire 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 |
| DS1306_05 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Serial Alarm Real-Time Clock |
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