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型號(hào)：	MQ80C52CXXX-36SBR
廠商：	TEMIC SEMICONDUCTORS
元件分類：	微控制器/微處理器
英文描述：	8-BIT, MROM, 36 MHz, MICROCONTROLLER, CQFP44
文件頁(yè)數(shù)：	1329/1447頁(yè)
文件大?。?/td>	3788K
代理商：	MQ80C52CXXX-36SBR

6437E–ATARM–23-Apr-13

Transfer Without DMA

Important. If the DMA is not to be used, it is necessary that it be disabled because otherwise it

can be enabled by previous versions of software without warning. If this should occur, the DMA

can process data before an interrupt without knowledge of the user.

The recommended means to disable DMA is as follows:

// Reset IP UDPHS

AT91C_BASE_UDPHS->UDPHS_CTRL &= ~AT91C_UDPHS_EN_UDPHS;

AT91C_BASE_UDPHS->UDPHS_CTRL |= AT91C_UDPHS_EN_UDPHS;

// With OR without DMA !!!

for( i=1; i<=((AT91C_BASE_UDPHS->UDPHS_IPFEATURES &

AT91C_UDPHS_DMA_CHANNEL_NBR)>>4); i++ ) {

// RESET endpoint canal DMA:

// DMA stop channel command

AT91C_BASE_UDPHS->UDPHS_DMA[i].UDPHS_DMACONTROL = 0;

// Disable endpoint

AT91C_BASE_UDPHS->UDPHS_EPT[i].UDPHS_EPTCTLDIS |= 0XFFFFFFFF;

// Reset endpoint config

AT91C_BASE_UDPHS->UDPHS_EPT[i].UDPHS_EPTCTLCFG = 0;

// Reset DMA channel (Buff count and Control field)

AT91C_BASE_UDPHS->UDPHS_DMA[i].UDPHS_DMACONTROL = 0x02;

STOP command

// Reset DMA channel 0 (STOP)

AT91C_BASE_UDPHS->UDPHS_DMA[i].UDPHS_DMACONTROL = 0;

// Clear DMA channel status (read the register for clear it)

AT91C_BASE_UDPHS->UDPHS_DMA[i].UDPHS_DMASTATUS =

AT91C_BASE_UDPHS->UDPHS_DMA[i].UDPHS_DMASTATUS;

Handling Transactions with USB V2.0 Device Peripheral

Setup Transaction

The setup packet is valid in the DPR while RX_SETUP is set. Once RX_SETUP is cleared by

the application, the UDPHS accepts the next packets sent over the device endpoint.

When a valid setup packet is accepted by the UDPHS:

the UDPHS device automatically acknowledges the setup packet (sends an ACK response)

payload data is written in the endpoint

sets the RX_SETUP interrupt

the BYTE_COUNT field in the UDPHS_EPTSTAx register is updated

An endpoint interrupt is generated while RX_SETUP in the UDPHS_EPTSTAx register is not

cleared. This interrupt is carried out to the microcontroller if interrupts are enabled for this

相關(guān)PDF資料	PDF描述
MT80C31-25R	8-BIT, 25 MHz, MICROCONTROLLER, PQFP44
MQ80C52TXXX-16/883	8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQFP44
MR80C52EXXX-20SCD	8-BIT, MROM, 20 MHz, MICROCONTROLLER, CQCC44
MR80C32-16SHXXX	8-BIT, 16 MHz, MICROCONTROLLER, CQCC44
MD80C32EXXX-30/883	8-BIT, 30 MHz, MICROCONTROLLER, CDIP40

相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
MQ82370-20	制造商:Rochester Electronics LLC 功能描述:- Bulk
MQ8238020	制造商:Intel 功能描述:CONTROLLER: OTHER
MQ82380-20	制造商:Rochester Electronics LLC 功能描述:- Bulk
MQ82380-20/R	制造商:Rochester Electronics LLC 功能描述:
MQ82592	制造商:Rochester Electronics LLC 功能描述:- Bulk

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