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參數(shù)資料
| 型號： | DS83C530-QNL |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | Microcontroller |
| 英文描述： | 8-BIT, MROM, 33 MHz, MICROCONTROLLER, PQCC52 |
| 封裝： | PLASTIC, LCC-52 |
| 文件頁數(shù)： | 9/45頁 |
| 文件大?。?/td> | 649K |
| 代理商： | DS83C530-QNL |
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DS87C530/DS83C530 EPROM/ROM Microcontrollers with Real-Time Clock
17 of 45
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)
PMM1
(64 CLOCKS)
(kHz)
PMM2
(1024 CLOCKS)
(kHz)
11.0592
2.765
172.8
10.8
16
4.00
250.0
15.6
25
6.25
390.6
24.4
33
8.25
515.6
32.2
Table 5. Typical Operating Current in PMM
CRYSTAL SPEED
(MHz)
FULL OPERATION
(4 CLOCKS)
(mA)
PMM1
(64 CLOCKS)
(mA)
PMM2
(1024 CLOCKS)
(mA)
11.0592
13.1
5.3
4.8
16
17.2
6.4
5.6
25
25.7
8.1
7.0
33
32.8
9.8
8.2
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS87C530-QNL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PQCC52 |
| DS83C530-QCL | 8-BIT, MROM, 33 MHz, MICROCONTROLLER, PQCC52 |
| DS87C530-KCL | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, CQCC52 |
| DTA-03D-1.5-TA-P | POSITION, LINEAR SENSOR-AC, -3-3mm |
| DTA-01D-3-SA-P | POSITION, LINEAR SENSOR-AC, -1-1mm |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS83C530-QNL+ | 制造商:DALLAS 制造商全稱: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:未知廠家 功能描述:Peripheral (Multifunction) Controller |
| DS84 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| DS840 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| DS843 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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