- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄97909 > EM6821TQ52B Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0°C to 70°C; Package: 8-EPSOIC PDF資料下載
參數(shù)資料
| 型號： | EM6821TQ52B |
| 英文描述： | Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0°C to 70°C; Package: 8-EPSOIC |
| 中文描述： | 微控制器 |
| 文件頁數(shù)： | 7/69頁 |
| 文件大?。?/td> | 852K |
| 代理商： | EM6821TQ52B |
第1頁第2頁第3頁第4頁第5頁第6頁當(dāng)前第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁
EM6821
10/01, Revision A/386
Copyright
2001, EM Microelectronic-Marin SA
15
www.emmicroelectronic.com
6.2.2 Pull-up or Pull-down
Each of the input port terminals PA[3:0] has a resistor integrated which can be used either as pull-up or pull-
down resistor, depending on the selected metal mask options. See the port A metal mask chapter for details.
The pull resistor can be inhibited using the NoPullPA[n] bits in the register OptNoPullPA.
Table 6.2.1. Pull-up or Pull-down Resistor on Port A Inputs
Option mask
pull-up
MPAPU[n]
Option mask
pull-down
MPAPD[n]
NoPullPA[n]
value
Action
no
x
no pull-up, no pull-down
no
yes
0
no pull-up, pull-down
no
yes
1
no pull-up, no pull-down
yes
no
0
pull-up, no pull-down
yes
no
1
no pull-up , no pull-down
yes
x
not allowed*
* only pull-up or pull-down may be chosen on any port A terminal (one choice is excluding the other)
6.2.3 Software Test Variables
The port A terminals PA[2:0] are also used as input conditions for conditional software branches. Independent
of the OPTDebIntPA and the OPTIntEdgPA. These CPU inputs always have a debouncer.
- Debounced PA[0] is connected to CPU TestVar1.
- Debounced PA[1] is connected to CPU TestVar2.
- Debounced PA[2] is connected to CPU TestVar3.
6.2.4 Port A for 10-Bit Counter and MSC
The PA[0] and PA[3] inputs can be used as the clock input terminal for the 10 bit counter in "event count" mode.
As for the IRQ generation one can choose debouncer or direct input with the register OPTDebIntPA and non-
inverted or inverted input with the register OPTIntEdgPA. Debouncer input is always recommended.
Pad input PA[3] is also used as start/stop control for the millisecond counter. This control signal is derived from
PA[3], it is independent of the port A debouncer and edge selection. Refer also to Figure 10.
6.3 Port A Registers
Table 6.3.1 Register RegPA
Bit
Name
Reset
R/W
Description
3
PAData[3]
-
R*
PA[3] input status
2
PAData[2]
-
R*
PA[2] input status
1
PAData[1]
-
R*
PA[1] input status
0
PAData[0]
-
R*
PA[0] input status
* Direct read on port A terminals
with
n=0…3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| EM78156E | Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0°C to 70°C; Package: 14-SOIC |
| EM78458 | Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: 0°C to 70°C; Package: 16-QFN |
| EM78459 | Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP; Temperature Range: -40°C to 85°C; Package: 14-SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EM685 | 制造商:Distributed By MCM 功能描述:UTILITY MOTOR |
| EM68C16CWVB-25H | 制造商:Etron 功能描述:DDRII SDRAM,1Gb,64M*16,Pb & Halogen free |
| EM6A8160TSA | 制造商:ETRON 制造商全稱:ETRON 功能描述:4M x 16 DDR Synchronous DRAM (SDRAM) |
| EM6A8160TSA-5G | 制造商:ETRON 制造商全稱:ETRON 功能描述:4M x 16 DDR Synchronous DRAM (SDRAM) |
| EM6A9160 | 制造商:ETRON 制造商全稱:ETRON 功能描述:8M x 16 DDR Synchronous DRAM (SDRAM) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。