參數(shù)資料
型號(hào)： DS87C530-QCL
英文描述： EPROM MICRO WITH REAL TIME CLOCK
中文描述： 微型存儲(chǔ)器與實(shí)時(shí)時(shí)鐘
文件頁(yè)數(shù)： 14/40頁(yè)
文件大?。?/td> 435K
代理商： DS87C530-QCL
DS87C530
022197 14/40
DPL
DPH
DPL1
DPH1
DPS
82h
83h
84h
85h
86h
Low byte original DPTR
High byte original DPTR
Low byte new DPTR
High byte new DPTR
DPTR Select (lsb)
POWER MANAGEMENT
Along with the standard Idle and power down (Stop)
modes of the standard 80C52, the DS87C530 provides
a new Power Management Mode. This mode allows the
processor to continue functioning, yet to save power
compared with full operation. The DS87C530 also fea-
tures several enhancements to Stop mode that make it
more useful.
POWER MANAGEMENT MODE (PMM)
Power Management Mode offers a complete scheme of
reduced internal clock speeds that allow the CPU to run
software but to use substantially less power. During
default operation, the DS87C530 uses four clocks per
machine cycle. Thus the instruction cycle rate is
(Clock/4). At 33 MHz crystal speed, the instruction cycle
speed is 8.25 MHz (33/4). In PMM, the microcontroller
continues to operate but uses an internally divided ver-
sion of the clock source. This creates a lower power
state without external components. It offers a choice of
two reduced instruction cycle speeds (and two clock
sources – discussed below). The speeds are (Clock/64)
and (Clock/1024).
Software is the only mechanism to invoke the PMM.
Table 5 illustrates the instruction cycle rate in PMM for
several common crystal frequencies. Since power con-
sumption is a direct function of operating speed, PMM 1
eliminates most of the power consumption while still
allowing a reasonable speed of processing. PMM 2 runs
very slowly and provides the lowest power consumption
without stopping the CPU. This is illustrated in Table 6.
Note that PMM provides a lower power condition than
Idle mode. This is because in Idle, all clocked functions
such as timers run at a rate of crystal divided by 4. Since
wake–up from PMM is as fast as or faster than from Idle
and PMM allows the CPU to operate (even if doing
NOPs), there is little reason to use Idle mode in new
designs.
INSTRUCTION CYCLE RATE
Table 5
CRYSTAL SPEED
FULL OPERATION
(4 CLOCKS)
PMM 1
(64 CLOCKS)
PMM 2
(1024 CLOCKS)
1.8432 MHz
460.8 KHz
28.8 KHz
1.8 KHz
11.0592 MHz
2.765 MHz
172.8 KHz
10.8 KHz
22 MHz
5.53 MHz
345.6 KHz
21.6 KHz
25 MHz
6.25 MHz
390.6 KHz
24.4 KHz
33 MHz
8.25 MHz
515.6 KHz
32.2 KHz
OPERATING CURRENT ESTIMATES IN PMM
Table 6
CRYSTAL SPEED
FULL OPERATION
(4 CLOCKS)
PMM 1
(64 CLOCKS)
PMM 2
(1024 CLOCKS)
1.8432 MHz
3.1 mA
1.2 mA
1.0 mA
3.57 MHz
5.3 mA
1.6 mA
1.1 mA
11.0592 MHz
15.5 mA
4.8 mA
4.0 mA
16 MHz
21 mA
7.1 mA
6.0 mA
22 MHz
25.5 mA
8.3 mA
6.5 mA
25 MHz
31 mA
9.7 mA
8.0 mA
33 MHz
36 mA
12.0 mA
10.0 mA
相關(guān)PDF資料
PDF描述
DS87C530 EPROM MICRO WITH REAL TIME CLOCK
DS87C530-ENL EPROM MICRO WITH REAL TIME CLOCK
DS87C530-KCL EPROM MICRO WITH REAL TIME CLOCK
DS87C530-QNL EPROM MICRO WITH REAL TIME CLOCK
DS87C550 EPROM High-Speed Micro with A/D and PWM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS87C530-QCL+ 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-QEL 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:
DS87C530-QNL 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-QNL+ 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
DS87C530Z+ECL 制造商:Maxim Integrated Products 功能描述:MICRO OTP RTC 33MHZ 52P TQFP PB-FRR - Trays
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