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DS2404
7 of 29
Alarm Registers
The alarm registers for the real-time clock, interval timer, and cycle counter all operate in the same
manner. When the value of a given counter equals the value in its associated alarm register, the
appropriate flag bit is set in the status register. If the corresponding interrupt enable bit(s) in the status
register is set, an interrupt is generated. If a counter and its associated alarm register are write protected
when an alarm occurs, access to the device becomes limited. (See “Status/Control”, “Interrupts”, and the
“Programmable Expiration” sections.)
STATUS/CONTROL REGISTERS
The status and control registers are the first two bytes of page 16 (see “Memory Map”, Figure 4).
Status Register
7
6
5
4
3
2
1
0
X
CCE
ITE
RTE
CCF
ITF
RTF
0200h
0
RTF
Real-time clock alarm flag
1
ITF
Interval timer alarm flag
2
CCF
Cycle counter alarm flag
When a given alarm occurs, the corresponding alarm flag is set to a logic 1. The alarm flag(s) is cleared
by reading the status register.
3
RTE
Real-time interrupt enable
4
ITE
Interval timer interrupt enable
5
CCE
Cycle counter interrupt enable
Writing any of the interrupt enable bits to a logic 0 will allow an interrupt condition to be generated when
its corresponding alarm flag is set (see “Interrupts” section).
Control Register
7
6
5
4
3
2
1
0
DSEL
START
STOP
MAN.
AUTO
OSC
RO
WPC
WPI
WPR
0201h
0
WPR Write protect real-time clock/alarm registers
1
WPI
Write protect interval timer/alarm registers
2
WPC Write protect cycle counter/alarm registers
Don’t care bits
Read Only
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相关代理商/技术参数
DS2404B/T&R 制造商:Maxim Integrated Products 功能描述:ECONORAM/TIME, SSOP16-TRL (GENERIC) - Tape and Reel
DS2404B+ 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 512BYTE 16SSOP - Rail/Tube
DS2404B+T&R 制造商:Maxim Integrated Products 功能描述:REAL TIME CLOCK SERL 512BYTE 16SSOP - Tape and Reel
DS2404FP000 制造商:Thomas & Betts 功能描述:200A,CON,3P4W,MG,404,3P480V
DS2404FP000/DF2029 制造商:Thomas & Betts 功能描述:RS DS2404FP000/DF2029 200A,CON,3P4W
DS2404FP000/DF2032 制造商:Thomas & Betts 功能描述:200A,CON,3P4W,MG,404,3P480V,DF2032
DS2404FP00K 制造商:Thomas & Betts 功能描述:200A,CON,3P4W,MG,404,00K,3P480V
DS2404FPOOO/DF2029 制造商:Thomas & Betts 功能描述:RS DS2404FPOOO/DF2029 200A,CON,3P4W