 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
MC34708 数据表(PDF) 45 Page - Freescale Semiconductor, Inc |
|
|
|||||||||||||||||||||||||||||
MC34708 数据表(HTML) 45 Page - Freescale Semiconductor, Inc |
|
|
45 / 159 page  Analog Integrated Circuit Device Data 45 Freescale Semiconductor MC34708 Functional Block Description In addition to controlling the operating mode in Standby, the voltage setting can be changed. The transition in voltage is handled in a controlled slope manner, see Dynamic Voltage Scaling for details. Each regulator has an associated set of SPI bits for Standby mode set points. By default, the Standby settings are identical to the non-standby settings which are initially defined by PUMSx programming. The actual operating mode of the Switching regulators as a function of the STANDBY pin is not reflected through the SPI. In other words, the SPI will read back what is programmed in SWxMODE[3:0], not the actual state that may be altered as described previously. Two tables follow for mode control in the low power Off states. Note that a low power Off activated SWx should use the Standby set point as programmed by SWxSTBY[4:0]. The activated regulator(s) will maintain settings for mode and voltage until the next startup event. When the respective time slot of the startup sequencer is reached for a given regulator, its mode and voltage settings will be updated the same as if starting out of the Off state (except that switching regulators active through a low power Off mode will not be off when the startup sequencer is started). 0010 PWMPS Off 0011 PFM Off 0100 APS Off 0101 PWM PWM 0110 PWM APS 0111 Off Off 1000 APS APS 1001 PWM PWMPS 1010 PWMPS PWMPS 1011 PWMPS APS 1100 APS PFM 1101 PWM PFM 1110 PWMPS PFM 1111 PFM PFM Table 33. Switching regulator Control In Memory Hold SWxMHMODE Memory Hold Operational Mode (42) 0 Off 1 PFM Notes: 42. For Memory Hold mode, an activated SWx should use the Standby set point as programmed by SWxSTBY[4:0]. Table 34. Switching regulator Control In User Off SWxUOMODE User Off Operational Mode (43) 0 Off 1 PFM Notes: 43. For User Off mode, an activated SWx should use the Standby set point as programmed by SWxSTBY[4:0]. Table 32. Switching regulator Mode Control for Normal and Standby Operation SWxMODE[3:0] Normal Mode Standby Mode |
|
链接网址 |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 数据表链接 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
