Electronic Components Datasheet Search
Selected language     English  ▼


ST7DALI Datasheet(PDF) 38 Page - STMicroelectronics

Part No. ST7DALI
Description  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI, DALI
Download  141 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo 

 38 page
background image
ST7DALI
38/141
9 POWER SAVING MODES
9.1 INTRODUCTION
To give a large measure of flexibility to the applica-
tion in terms of power consumption, five main pow-
er saving modes are implemented in the ST7 (see
Figure 20):
Slow
Wait (and Slow-Wait)
Active Halt
Auto Wake up From Halt (AWUFH)
Halt
After a RESET the normal operating mode is se-
lected by default (RUN mode). This mode drives
the device (CPU and embedded peripherals) by
means of a master clock which is based on the
main oscillator frequency divided or multiplied by 2
(fOSC2).
From RUN mode, the different power saving
modes may be selected by setting the relevant
register bits or by calling the specific ST7 software
instruction whose action depends on the oscillator
status.
Figure 20. Power Saving Mode Transitions
9.2 SLOW MODE
This mode has two targets:
– To reduce power consumption by decreasing the
internal clock in the device,
– To adapt the internal clock frequency (fCPU) to
the available supply voltage.
SLOW mode is controlled by the SMS bit in the
MCCSR register which enables or disables Slow
mode.
In this mode, the oscillator frequency is divided by
32. The CPU and peripherals are clocked at this
lower frequency.
Note: SLOW-WAIT mode is activated when enter-
ing WAIT mode while the device is already in
SLOW mode.
Figure 21. SLOW Mode Clock Transition
POWER CONSUMPTION
WAIT
SLOW
RUN
ACTIVE HALT
High
Low
SLOW WAIT
AUTO WAKE UP FROM HALT
HALT
SMS
fCPU
NORMAL RUN MODE
REQUEST
fOSC
fOSC/32
fOSC
1




Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54  55  56  57  58  59  60  61  62  63  64  65  66  67  68  69  70  71  72  73  74  75  76  77  78  79  80  81  82  83  84  85  86  87  88  89  90  91  92  93  94  95  96  97  98  99  100   ...More


Datasheet Download



Related Electronics Part Number

Part NumberComponents DescriptionHtml ViewManufacturer
ST7LITE18-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY DATA EEPROM ADC 4 TIMERS SPI 1 2 3 4 5 MoreSTMicroelectronics
ST7LITE08-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY DATA EEPROM ADC TIMERS SPI 1 2 3 4 5 MoreSTMicroelectronics
ST7LITE28-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY DATA EEPROM ADC TIMERS SPI 1 2 3 4 5 MoreSTMicroelectronics
ST7LITE38-BIT MCU WITH SINGLE VOLTAGE FLASH DATA EEPROM ADC TIMERS SPI LINSCI 1 2 3 4 5 MoreSTMicroelectronics
ST72334J8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY ADC 16-BIT TIMERS SPI SCI INTERFACES 1 2 3 4 5 MoreSTMicroelectronics
ST72104G8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY ADC 16-BIT TIMERS SPI I2C INTERFACES 1 2 3 4 5 MoreSTMicroelectronics
ST7262LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS FLASH OR ROM MEMORY LVD WDG 10-BIT ADC 2 TIMERS SCI SPI 1 2 3 4 5 MoreSTMicroelectronics
ST72260G8-BIT MCU WITH FLASH OR ROM MEMORY ADC TWO 16-BIT TIMERS I2C SPI SCI INTERFACES 1 2 3 4 5 MoreSTMicroelectronics
ST72311R8-BIT MCU WITH NESTED INTERRUPTS EEPROM ADC 16-BIT TIMERS 8-BIT PWM ART SPI SCI CAN INTERFACES 1 2 3 4 5 MoreSTMicroelectronics

Link URL

Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Bookmark   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com 2003 - 2017    


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl