AT90SCR100 datasheet(211/433 Pages) ATMEL

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211

TPR0327AY–SMS–30Jan09

AT90SCR100

Figure 17-6.

Pipe activation flow:

Once the Pipe is activated (UPCRX.PEN set), the hardware is ready to send requests to the

Device.

When configured (UPSTAX.CFGOK=1), only the Pipe Token (UPCFG0X.PTOKEN) and the

polling interval for Interrupt pipe can be modified.

There are 4 pipes to configure. A Control type pipe supports only 1 bank (or data bank). Any

other value will lead to a configuration error (UPSTAX.CFGOK=0).

To guarantee a correct operation of the USB Host Controller:

• The pipe 0 size must not be greater than 32 bytes.

• The pipe 1 size must not be greater than 64 bytes.

• The pipe 2 size must not be greater than 64 bytes.

• The pipe 3 size must not be greater than 8 bytes.

Pipe Activation

Pipe activated

and freezed

ERROR

UPCRX.PEN=1

Update UPCFG2X

.INTFRQ

(interrupt only)

Update: UPCFG0X

.PTYPE

.PTOKEN

.PEPNUM

Configure the polling interval for

interrupt pipe

UPNUM.PNUM=X

Select the pipe to configure

Select the pipe type:

Configure the Pipe memory:

- Type (Control, Isochronous, Bulk, I

- Token (IN, OUT, SETUP)

- Endpoint Number

Update: UPCFG1X

.PSIZE

.PBK

.CFGMEM

- Pipesize

- Number Of Banks

UPSTAX.CFGOK=1

Caution

AT90SCR100 Datasheet(PDF) 211 Page - ATMEL Corporation

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