參數(shù)資料
型號(hào)： DS87C530-ECL
廠商： DALLAS SEMICONDUCTOR
元件分類： Microcontroller
英文描述： 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP52
封裝： TQFP-52
文件頁數(shù)： 44/44頁
文件大?。?/td> 754K
代理商： DS87C530-ECL
DS87C530/DS83C530
9 of 44
REGISTER
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
ADDRESS
PSW
CY
AC
F0
RS1
RS0
OV
FL
P
D0h
WDCON
SMOD_1
POR
EPFI
PFI
WDIP
WTRF
EWT
RWT
D8h
ACC
E0h
EIE
-
ERTCI
EWDI
EX5
EX4
EX3
EX2
E8h
B
F0h
RTASS
F2h
RTAS
00
F3h
RTAM
00
F4h
RTAH
00
0
F5h
EIP
-
PRTCI
PWDI
PX5
PX4
PX3
PX2
F8h
RTCC
SSCE
SCE
MCE
HCE
RTCRE
RTCWE
RTCIF
RTCE
F9h
RTCSS
FAh
RTCS
00
FBh
RTCM
00
FCh
RTCH
FDh
RTCD0
FEh
RTCD1
FFh
NONVOLATILE FUNCTIONS
The DS87C530/DS83C530 provides two functions that are permanently powered if a user supplies an
external energy source. These are an on-chip Real Time Clock and a nonvolatile SRAM. The chip
contains all related functions and controls. The user must supply a backup source and a 32.768 kHz
timekeeping crystal.
REAL TIME CLOCK
The on-chip Real Time Clock (RTC) keeps time of day and calendar functions. Its time base is a 32.768
kHz crystal between pins RTCX1 and RTCX2. The RTC maintains time to 1/256 of a second. It also
allows a user to read (and write) seconds, minutes, hours, day of the week, and date. The clock
organization is shown in Figure 2.
Timekeeping registers allow easy access to commonly needed time values. For example, software can
simply check the elapsed number of minutes by reading one register. Alternately, it can read the complete
time of day, including subseconds, in only four registers. The calendar stores its data in binary form.
While this requires software translation, it allows complete flexibility as to the exact value. A user can
start the calendar with a variety of selections since it is simply a 16-bit binary number of days. This
number allows a total range of 179 years beginning from 0000.
The RTC features a programmable alarm condition. A user selects the alarm time. When the RTC reaches
the selected value, it sets a flag. This will cause an interrupt if enabled, even in Stop mode. The alarm
consists of a comparator that matches the user value against the RTC actual value. A user can select a
match for 1 or more of the sub-seconds, seconds, minutes, or hours.
This allows an interrupt
automatically to occur once per second, once per minute, once per hour, or once per day. Enabling
interrupts with no match will generate an interrupt 256 times per second.
Software enables the timekeeper oscillator using the RTC Enable bit in the RTC Control register (F9h).
This starts the clock. It can disable the oscillator to preserve the life of the backup energy-source if
相關(guān)PDF資料
PDF描述
DS87C520-MCL 8-BIT, OTPROM, MICROCONTROLLER, PDIP40
DS87C520-QNL 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQCC44
DS87C520-QCL 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQCC44
DS87C520-ECL 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQFP44
DS87C520-MNL 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PDIP40
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS87C530-ECL+ 功能描述:8位微控制器 -MCU EPROM MCU w/RTC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
DS87C530-ENL 功能描述:8位微控制器 -MCU EPROM MCU w/RTC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
DS87C530-ENL+ 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
DS87C530-KCL 功能描述:8位微控制器 -MCU EPROM MCU w/RTC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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