- 您现在的位置：买卖IC网 > PDF目录97909 > EM6617SO28A Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0°C to 70°C; Package: 8-EPSOIC T&R PDF资料下载
参数资料
| 型号： | EM6617SO28A |
| 英文描述： | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0°C to 70°C; Package: 8-EPSOIC T&R |
| 中文描述： | 微控制器 |
| 文件页数： | 14/67页 |
| 文件大小： | 824K |
| 代理商： | EM6617SO28A |
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页当前第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页第63页第64页第65页第66页第67页
EM6617
03/02 REV. C/442
Copyright
2002, EM Microelectronic-Marin SA
21
www.emmicroelectronic.com
For Metal mask selection and available resistor values refer to chapter 19.1.3.
Pull-down ON
: MPCPD[n] must be in place ,
AND
bit NoPdPC[n] must be ‘0’ .
Pull-down OFF
: MPCPD[n] is not in place,
OR
if MPCPD[n] is in place NoPdPC[n] = ‘1’ cuts off the pull-down.
OR
selecting NchOpDPC[n] = ‘1’ cuts off the pull-down.
Pull-up ON
: MPCPU[n] must be in place,
AND
bit NchOpDPC[n] must be ‘1’ ,
AND
(bit PCIOCntl = ‘0’ (input mode) OR if PBIOCntl = ‘1’ while PCData[n] = 1. )
Pull-up OFF
: MPCPU[n] is not in place,
OR
if MPCPU[n] is in place NchOpDPC[n] = ‘0’ cuts off the pull-up,
OR
if MPCPU[n] is in place and if NchOpDPC[n] = ‘1’ then PCData[n] = 0 cuts the pull-up.
Never pull-up and pull-down can be active at the same time.
For POWER SAVING one can switch off the port C pull resistors between two read phases. No cross current
flows in the input amplifier while the port C is not read. The recommended order is :
Switch on the pull resistor.
Allow sufficient time - RC constant - for the pull resistor to drive the line to either VSS or VDD.
Read the port C
Switch off the pull resistor
Minimum time with current on the pull resistor is 4 system clock periods, if the RC time constant is lower than 1
system clock period. Adding a NOP instruction before reading moves the number of periods with current in the
pull resistor to 6 and the maximum RC delay to 3 clock periods.
7.6.2 CMOS or Nch. Output
The port C outputs can be configured as either CMOS or Nch. open drain outputs. In CMOS both logic ‘1’ and
‘0’ are driven out on the terminal. In Nch. open drain only the logic ‘0’ is driven on the terminal, the logic ‘1’ value
is defined by the internal pull-up resistor (if implemented), or high impedance.
In CMOS output mode the pad can be driven high or low. Pull-ups and pull-downs are not active.
In CMOS input mode, if the corresponding metal option is in place (default), one can choose to have an internal
pull-down resistor by setting to “1“ the bit NoPdPC in OPTPCandStr register (default pull-down).
In N-Channel open drain mode, if the corresponding metal option is in place (default), one always has the pull-
up resistor active except if the port is in output mode and drives a "0" (RegPCCntl= "1", RegPBData[n]= "0") The
pull-down resistor is always off in Nch. open drain mode.
Pull-downs in CMOS input mode and weak pull-ups in Nch. open drain mode are port-wise configurable with the
register settings. The metal mask options to selectively connect or disconnect pull-up or pull-down resistors can
be different for each port C terminal.
7.7 Port C Registers
Table 7.7.1 Register RegPCData
Figure 16. CMOS or Nch. Open Drain Outputs
I / O
T e rm inal
PC [n ]
MU X
Ac tiv e Pu ll-u p
fo r H ig h S ta te
P C D a ta [n ]
T ri-S tate O u tput
B u ffer : H igh
Im pedanc e fo r
Da ta = 1
I / O
T e rm inal
PC [n ]
P CDa ta [n ]
T ri-S tate O u tput
B u ffer : c los ed
1
C M OS Ou tp u t
N c h. O pen D rain O u tput
相关PDF资料 |
PDF描述 |
|---|---|
| EM6617SO28B | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-EPSOIC T&R |
| EM6617TP28A | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0°C to 70°C; Package: 8-EPSOIC T&R |
| EM6617TP28B | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-EPSOIC T&R |
| EM6640SO18A | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 8-SOIC |
| EM6640SO18B | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 10-DFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EM6617SO28B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| EM6617TP28A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| EM6617TP28B | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| EM6617WP11 | 制造商:EMMICRO 制造商全称:EM Microelectronic - MARIN SA 功能描述:Ultra Low Power Microcontroller with ADC AND EEPROM |
| EM6617WP27 | 制造商:EMMICRO 制造商全称:EM Microelectronic - MARIN SA 功能描述:Ultra Low Power Microcontroller with ADC AND EEPROM |
发布紧急采购，3分钟左右您将得到回复。