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Section 26 USB 2.0 Host/Function Module
Page 1506 of 2108 R01UH0134EJ0400 Rev. 4.00
Sep 24, 2014
SH7262 Group, SH7264 Group
When a short packet is received in the data stage of control read transfer while the
SHTNAK bit in the DCPCFG register is set to 1.
If a short packet is received when the SHTNAK bit in PIPECFG has been set to 1 for bulk
transfer.
If the transaction counter ended when the SHTNAK bit has been set to 1 for bulk transfer.
BUF setting: There is no BUF writing by this module.
STALL setting: In the following cases, PID = STALL is set and issuing of tokens is
automatically stopped:
When STALL is received in response to the transmitted token.
When the size of the receive data packet exceeds the maximum packet size.
(b) When the function controller function has been selected and the response PID is set by
hardware
NAK setting: In the following cases, PID = NAK is set and NAK is always returned in
response to transactions:
When the SETUP token is received normally (DCP only).
If the transaction counter ended or a short packet is received when the SHTNAK bit in
PIPECFG has been set to 1 for bulk transfer.
BUF setting: There is no BUF writing by this module.
STALL setting: In the following cases, PID = STALL is set and STALL is always returned in
response to transactions:
When the size of the receive data packet exceeds the maximum packet size.
When a control transfer sequence error has been detected (DCP only).