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参数资料
| 型号： | DS1486P-120 |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Timer or RTC |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, DMA34 |
| 封装： | POWERCAP MODULE BOARD-34 |
| 文件页数： | 15/17页 |
| 文件大小： | 477K |
| 代理商： | DS1486P-120 |
DS1486/DS1486P
7 of 17
TIME OF DAY ALARM MASK BITS Figure 3
REGISTER
(3) MINUTES
(5) HOURS
(7) DAYS
1
ALARM ONCE PER MINUTE
0
1
ALARM WHEN MINUTES MATCH
0
1
ALARM WHEN HOURS AND MINUTES MATCH
0
ALARM WHEN HOURS, MINUTES, AND DAYS MATCH
NOTE: ANY OTHER BIT COMBINATIONS OF MASK BIT SETTINGS PRODUCE ILLOGICAL OPERATION.
COMMAND REGISTER
Address location 0Bh is the Command Register where mask bits, control bits and flag bits reside. The
operation of each bit is as follows:
TE - Bit 7 Transfer enable - This bit when set to a logic 0 will disable the transfer of data between
internal and external clock registers. The contents in the external clock registers are now frozen and reads
or writes will not be affected with updates. This bit must be set to a logic 1 to allow updates.
IPSW - Bit 6 Interrupt switch - When set to a logic 1, INTA is the Time of Day Alarm and INTB/( INTB )
is the Watchdog Alarm. When set to logic 0, this bit reverses the output pins. INTA is now the Watchdog
Alarm output and INTB/( INTB ) is the Time of Day Alarm output. The INTA /SQW output pin shares both
the interrupt A and square wave output function. INTA and the square wave function should never be
simultaneously enabled or a conflict may occur (32-pin DIP module only).
IBH/LO - Bit 5 Interrupt B Sink or Source Current - When this bit is set to a logic 1 and VCC is applied,
INTB/( INTB ) will source current (see DC characteristics IOH). When this bit is set to a logic 0, INTB
will sink current (see DC characteristics IOL).
PU/LVL - Bit 4 Interrupt pulse mode or level mode - This bit determines whether both interrupts will
output a pulse or level signal. When set to a logic 0, INTA and INTB/( INTB ) will be in the level mode.
When this bit is set to a logic 1, the pulse mode is selected and INTA will sink current for a minimum of
3 ms and then release. INTB/( INTB ) will either sink or source current, depending on the condition of Bit
5, for a minimum of 3 ms and then release. INTB will only source current when there is a voltage present
on VCC.
WAM - Bit 3 Watchdog Alarm Mask - When this bit is set to a logic 0, the Watchdog Interrupt output
will be activated. The activated state is determined by bits 1,4,5, and 6 of the COMMAND REGISTER.
When this bit is set to a logic 1, the Watchdog interrupt output is deactivated.
TDM - Bit 2 Time of Day Alarm Mask - When this bit is set to a logic 0, the Time of Day Alarm
Interrupt output will be activated. The activated state is determined by bits 0, 4, 5, and 6 of the
COMMAND REGISTER. When this bit is set to a logic 1, the Time of Day Alarm interrupt output is
deactivated.
WAF - Bit 1 Watchdog Alarm Flag - This bit is set to a logic 1 when a watchdog alarm interrupt occurs.
This bit is read only.
The bit is reset when any of the Watchdog Alarm registers are accessed.
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相关代理商/技术参数 |
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| DS1486P-120+ | 功能描述:实时时钟 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 |
| DS1486P-150 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:RAMified Watchdog Timekeeper |
| DS1487 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:Low Power RS-485 1⁄4 Unit Load Multipoint Transceiver |
| DS1487M | 功能描述:RS-422/RS-485 接口 IC RoHS:否 制造商:Maxim Integrated 数据速率:1136 Kbps 工作电源电压:3 V to 5.5 V 电源电流:5.9 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-28 封装:Tube |
| DS1487M/NOPB | 功能描述:RS-422/RS-485 接口 IC LO PR RS485/1/4 UNIT LOAD MULTIPT XCVR RoHS:否 制造商:Maxim Integrated 数据速率:1136 Kbps 工作电源电压:3 V to 5.5 V 电源电流:5.9 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-28 封装:Tube |
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