- 您现在的位置：买卖IC网 > PDF目录97909 > EM6640SO18B Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 10-DFN PDF资料下载
参数资料
| 型号： | EM6640SO18B |
| 英文描述： | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 10-DFN |
| 中文描述： | 微控制器 |
| 文件页数： | 27/62页 |
| 文件大小： | 620K |
| 代理商： | EM6640SO18B |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页当前第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页
EM6640
03/02 REV. C/446
Copyright
2002, EM Microelectronic-Marin SA
33
www.emmicroelectronic.com
8.2 SWB Interactive send mode
In interactive send mode, data to be sent must be loaded in RegSWBuff register (no RAM space is used for serial
transmission).
8.2.1 How the SWB in interactive mode works
One has first to select the serial transmission clock in RegSWBCntl register and load the first 4-bit package to be
sent in RegSWBuff register.
Then setting to “1“ the bit SWBStart in RegSWBSizeH register starts the transmission : data are transferred
from RegSWBuff register to shift register and put on serial data output. When RegSWBuff register is empty, an
interrupt request SWBempty which can not be masked is generated and TestVar[3] goes high.
According to the selected clock, one has to take into account how many instructions are needed to process
SWBempty interrupt request : recognize this interrupt (conditional jump on TESTvar[3]) and load the new 4-bit
package in RegSWBuff register.
Indeed, If processing of SWBempty interrupt request is too long and internal SHIFT register is empty before new
4-bit package was written in RegSWBuff register, the transmission is broken : serial clock output stops at "0", bit
SWBStart and SWBempty are cleared to “0“ and TestVar[3] remains to “1“. This could be the case for a 150kHz
transmission speed. The application must restart the serial transmission by writing the SWBStart in
RegSWBSizeH register after writing the next nibble to the RegSWBuff register
SWBempty and TestVar[3] are cleared to "0" at each RegSWBuff register writing operation.
After loading the last nibble in the RegSWBuff register a new interrupt is generated when this data is transferred
to an intermediate Shift Register. Precaution must be made in this case because the SWB will give repetitive
interrupts until the last data is sent out completely and the SWBStart bit goes low automatically. One possibility to
overcome this is to check in the Interrupt subroutine that the SWBStart bit went low before exiting interrupt.
At the end of transmission, one must write RegSWBuff register to set to “0“ TESTvar[3].
SysClk is shown two times longer for a better visibility !
Figure 25 Interactive Serial Write Buffer mode
N.B.
In interactive mode, the number of clocks per package is always equal to 4 and the level of the last bit
of the last package is not latched. These 2 features are valid only in automatic mode.
相关PDF资料 |
PDF描述 |
|---|---|
| EM6640TP16A | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 10-DFN |
| EM6640TP16B | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0°C to 70°C; Package: 8-SOIC |
| EM6821TQ52B | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0°C to 70°C; Package: 8-EPSOIC |
| EM6821TQ52D | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-SOIC |
| EM73MA89B | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-EPSOIC T&R |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EM6640TP16A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| EM6640TP16B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| EM6640WP11 | 制造商:EMMICRO 制造商全称:EM Microelectronic - MARIN SA 功能描述:Low Power Microcontroller with EEPROM AND RC Oscillator |
| EM6640WP27 | 制造商:EMMICRO 制造商全称:EM Microelectronic - MARIN SA 功能描述:Low Power Microcontroller with EEPROM AND RC Oscillator |
| EM6640WS11 | 制造商:EMMICRO 制造商全称:EM Microelectronic - MARIN SA 功能描述:Low Power Microcontroller with EEPROM AND RC Oscillator |
发布紧急采购，3分钟左右您将得到回复。