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型號：	S83C154DCXXX-12
廠商：	TEMIC SEMICONDUCTORS
元件分類：	微控制器/微處理器
英文描述：	8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQCC44
文件頁數(shù)：	639/1021頁
文件大?。?/td>	15196K
代理商：	S83C154DCXXX-12

32072H–AVR32–10/2012

AT32UC3A3

Pipe activation

The pipe is maintained inactive and reset (see Section 27.7.3.5 for more details) as long as it is

disabled (PENn is zero). The Data Toggle Sequence field (DTSEQ) is also reset.

The algorithm represented on Figure 27-23 on page 654 must be followed in order to activate a

Figure 27-23. Pipe Activation Algorithm

As long as the pipe is not correctly configured (UPSTAn.CFGOK is zero), the controller can not

send packets to the device through this pipe.

The UPSTAn.CFGOK bit is set only if the configured size and number of banks are correct com-

pared to their maximal allowed values for the pipe (see Table 27-1 on page 624) and to the

maximal FIFO size (i.e. the DPRAM size).

See Section 27.7.1.6 for more details about DPRAM management.

Once the pipe is correctly configured (UPSTAn.CFGOK is zero), only the PTOKEN and INTFRQ

fields can be written by software. INTFRQ is meaningless for non-interrupt pipes.

Whe n starting a n enu me ration, th e user ge ts the de vice d escripto r by send in g a

GET_DESCRIPTOR USB request. This descriptor contains the maximal packet size of the

device default control endpoint (bMaxPacketSize0) and the user re-configures the size of the

default control pipe with this size parameter.

Address setup

Once the device has answered the first host requests with the default device address 0, the host

assigns a new address to the device. The host controller has to send an USB reset to the device

and to send a SET_ADDRESS(addr) SETUP request with the new address to be used by the

device. Once this SETUP transaction is over, the user writes the new address into the USB Host

Address for Pipe n field in the USB Host Device Address register (UHADDR.UHADDRPn). All

following requests, on all pipes, will be performed using this new address.

Pipe Activated

Enable the pipe.

Test if the pipe configuration is

Configure the pipe:

- interrupt request frequency

- endpoint number

- number of banks

Allocate the configured DPRAM banks.

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
S83C154D-L16	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S83C154DT-12	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S83C154DT-16	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S83C154DT-20	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller
S83C154DT-25	制造商:未知廠家制造商全稱:未知廠家功能描述:8-Bit Microcontroller

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