參數(shù)資料
型號(hào)： DS83C530-QCL
廠商： DALLAS SEMICONDUCTOR
元件分類(lèi)： 微控制器/微處理器
英文描述： EPROM/ROM Microcontrollers with Real-Time Clock
中文描述： 8-BIT, UVPROM, 33 MHz, MICROCONTROLLER, CQCC52
封裝： WINDOWED, CERQUAD-52
文件頁(yè)數(shù)： 16/46頁(yè)
文件大?。?/td> 749K
代理商： DS83C530-QCL
DS87C530/DS83C530 EPROM/ROM Microcontrollers with Real-Time Clock
16 of 46
POWER MANAGEMENT
Along with the standard Idle and power-down (Stop) modes of the standard 80C52, the
DS87C530/DS83C530 provide a new Power Management Mode. This mode allows the processor to
continue functioning, yet to save power compared with full operation. The DS87C530/DS83C530 also
feature 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/DS83C530
use four clocks per machine cycle. Thus the instruction cycle rate is (Clock/4). At 33MHz crystal speed,
the instruction cycle speed is 8.25MHz (33/4). In PMM, the microcontroller continues to operate but uses
an internally divided version 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 4 illustrates the instruction cycle rate in PMM
for several common crystal frequencies. Since power consumption 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 5.
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.
Table 4. Machine Cycle Rate
CRYSTAL SPEED
(MHz)
FULL OPERATION
(4 CLOCKS)
(MHz)
2.765
4.00
6.25
8.25
PMM1
(64 CLOCKS)
(kHz)
172.8
250.0
390.6
515.6
PMM2
(1024 CLOCKS)
(kHz)
10.8
15.6
24.4
32.2
11.0592
16
25
33
Table 5. Typical Operating Current in PMM
CRYSTAL SPEED
(MHz)
FULL OPERATION
(4 CLOCKS)
(mA)
13.1
17.2
25.7
32.8
PMM1
(64 CLOCKS)
(mA)
5.3
6.4
8.1
9.8
PMM2
(1024 CLOCKS)
(mA)
4.8
5.6
7.0
8.2
11.0592
16
25
33
相關(guān)PDF資料
PDF描述
DS87C530-ECL EPROM/ROM Microcontrollers with Real-Time Clock
DS83C530-DS87C530 EPROM/ROM Microcontrollers with Real-Time Clock
DS83C530-ECL EPROM/ROM Microcontrollers with Real-Time Clock
DS83C530-ENL EPROM/ROM Microcontrollers with Real-Time Clock
DS83C530-QNL EPROM/ROM Microcontrollers with Real-Time Clock
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS83C530-QCL+ 制造商:DALLAS 制造商全稱(chēng):Dallas Semiconductor 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
DS83C530-QNL 制造商:MAXIM 制造商全稱(chēng):Maxim Integrated Products 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
DS83C530-QNL+ 制造商:DALLAS 制造商全稱(chēng):Dallas Semiconductor 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
DS83CH20 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Peripheral (Multifunction) Controller
DS84 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Analog IC
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