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CHAPTER 8 USB FUNCTION
User’s Manual U12978EJ3V0UD
118
Table 8-3. Conditions in Transmit Reservation (2/2)
(b) Transmit reservation for Endpoint1 and IN token packet
Type of Reservation DT01EN DT11EN E1STEN E1NAEN
Transmit reservation of data in transmit buffer 0 1 0 0 0
Transmit reservation of data in transmit buffer 1 0 1 0 0
Endpoint 1 STALL transmit reservation
(halt status)
0010
Endpoint 1 NAK transmit reservation
(no transmit data)
0001
Two or more reservations above Setting prohibited
(c) Handshake transmit reservation for data packet
Type of Reservation STALEN DNAEN
STALL transmit reservation during occurrence
of length error
10
NAK transmit reservation during previous
receive data save
Note
01
Two or more reservations above Setting prohibited
Type of Reservation ACKEN DNAEN
ACK transmit reservation during normal data
packet reception
10
NAK transmit reservation during previous
receive data save
Note
01
Two or more reservations above Setting prohibited
Note When saving the receive data packet, set DWRMSK to 1 (bit 0 of the data/handshake packet
receive mode register (URXMOD)) at the same time.