Fujitsu F2MC-16LX Hardware Manual page 294

16-bit microcontroller mb90330 series

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CHAPTER 13 USB FUNCTION

[bit 10] NULE: NULL automatic transfer enable bit

This bit sets up a mode where the last packet transfer will be detected and 0-byte data transfer will be

automatically sent when IN- direction data transfer request arrives if the automatic buffer transfer mode

is set (DMAE=1).

Setting the NULE bit has no effect on communications when transferring data to OUT direction or the

automatic buffer transfer mode is not set.

[bit 9] STAL:STALL set bit

Setting the STAL bit can put EndPoint in STALL status (STALL response).

STALL keeps responding for HOST while setting the STAL bit. The USB Function can return from

STALL status with the ClearFutcher command from the host after the STAL bit was deselected.

[EP2 to EP5: bit 8, bit7] EP2 to EP5 Reserved bit

These bit are reserved bit. Please write "0". The bit always reads "0".

[EP1: bits 8,7, bit 6 to bit 0] PKS: Packet size set bit

The number of maximum forwarding by one packet is specified. The following lists a maximum

number of transfer packets that can be specified in each of EndPoint1 to EndPoint5.

Setting any number not less than a maximum number of transfer (100

prohibited. Please write "00" in bit 8, bit 7 about EndPoint2 to EndPoint5. In addition, when using the

automatic buffer transfer mode (DMAE=1), setting bit 0 to bit2 in the corresponding EndPoint is

Release of the NULL automatic TRANSFER mode

Set of the NULL automatic TRANSFER mode

Release of state of STALL

Set of state of STALL (STALL response)

Max. number of transfer

256 bytes (The odd can be set).

64 bytes (The odd can be set).

Operating mode

Range which can be set