- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄364678 > AN2933 Understanding the eTPU Channel Hardware PDF資料下載
參數(shù)資料
| 型號： | AN2933 |
| 英文描述： | Understanding the eTPU Channel Hardware |
| 中文描述： | 理解硬件頻道的eTPU |
| 文件頁數(shù)： | 10/40頁 |
| 文件大?。?/td> | 741K |
| 代理商： | AN2933 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁當前第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
Understanding the eTPU Channel Hardware, Rev. 0
Architecture of the eTPU Channel
Freescale Semiconductor
10
2.3.3
Pin Filters
Every channel pin has an input filter designed to reject fast noise pulses. The filter is programmed
identically for all eTPU input pins, except optionally the Angle Clock. When the filter is programmed to
reject pulses faster than a couple of clock periods, it will also delay the recognition of an input transition
by a similar amount of time. See the Reference Manual for details.
2.3.4
Output Pin Buffers
The eTPU provides software control of pin output buffers for each channel. Each buffer, when enabled,
effectively connects the eTPU output to the MCU pin. When the buffer is disabled, the output drive is
tri-stated. However, in some implementations, the MCU does not provide connection from the eTPU to
the output buffers enable control. In such cases the eTPU output may be controlled by another facility on
the MCU. See the MCU Reference Manual for details.
2.4
Other Channel Resources
In addition to the action units and pin logic, each channel has two flags and two function mode bits.
2.4.1
Channel Flags
There are two channel flags associated with each channel. These flags, designated flag0 and flag1, can be
set and cleared by the eTPU software, and can be used to qualify the entry vectors. They cannot be read or
tested by the eTPU engine.
2.4.2
Function Modes
Not shown in the channel block diagram, there are also two function mode bits associated with each
channel. There may be set or cleared by the host only, and tested by the eTPU.
2.5
Channel Service Requests
The channel hardware is one of the three sources of service requests that can be made for an eTPU channel,
along with host service requests (HSRs) and links from other channels. Depending on the channel mode
and software, transitions and matches can result in channel service requests only after they are enabled by
eTPU software. Therefore a channel cannot respond to a hardware request until it has received at least one
HSR or link, and executed a channel initialization thread. Somewhere in that thread should be the macro:
EnableMatchAndTransitionEventHandling()
or
EnableEventHandling()
. No channel service requests will
be granted by the eTPU scheduler until that instruction is executed. The channel service requests can also
be disabled by executing
DisableMatchAndTransitionEventHandling()
or, alternately
DisableEventHandling()
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AN30210A | Analog IC |
| AN304 | Single Differential Amplifier |
| AN305 | Optoelectronic |
| AN3100 | General Purpose Amplifier Biasing |
| AN3129S | Analog IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AN294 | 制造商:SILABS 制造商全稱:SILABS 功能描述:Si825X FREQUENCY COMPENSATION SIMULATOR FOR DIGITAL BUCK CONVERTERS |
| AN295 | 制造商:Panasonic Industrial Company 功能描述:IC |
| AN296 | 制造商:SILABS 制造商全稱:SILABS 功能描述:USING THE Si3400 AND Si3401 POE PD CONTROLLERS IN ISOLATED AND NON-ISOLATED DESIGNS |
| AN2-B0-11-615-533-C | 制造商:Carling Technologies 功能描述:A-SERIES CIRCUIT BREAKER - Bulk |
| AN2-B0-22-624-543-C | 制造商:Carling Technologies 功能描述:A-SERIES CIRCUIT BREAKER - Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。