Toshiba H1 Series, TLCS-900, TMP92CZ26AXBG TMP92CZ26A , 92CZ26A-475, 3.16.11 Points to Note and Restrictions

TMP92CZ26A
92CZ26A-475
3.16.11 Points to Note and Restrictions
1. Limitation of writing to COMMAND reg ister in special timing
When “STALL” command is issued, ENDPOINT status might be shift to “INVALID”.
To avoid this problem , keep the below rout ine.
a. BULK (IN/OUT)
In case issue STALL command to endpoint in BULK transfer, be sure to issue
STALL command after stop RD/WR accessing to endpoint; that is UDC returns
NAK in the response of token from host. INT_EPxNAK should be used to detect
NAK transmit.
b. CONTROL OUT with data stage (software response)
If STALL needs to be set for endpoint 0 judging from request after receiving
INT_SETUP interrupt, access to SetupReceived register. After that, issue STALL
command after detecting INT_ENDPOINT0 interrupt.
c. CONTROL OUT without data stage (software response)
If STALL needs to be set for endpoint 0 judging from request after receiving
INT_SETUP interrupt, issue STALL command before access to eop regist er.
d. CONTROL IN(software response)
If STALL needs to be set for endpoint 0 judging from request after receiving
INT_SETUP interrupt, issue STALL command before set the first transmit data
to host.
2. Limitation of EP x_STATUS<STATUS2:0> when ex ecute USB_RESET com mand
EPx_STATUS<STATUS2:0> may indicates different condition, if execute
USB_RESET command to the endpoint in the process of token. To avoid this
phenomenon , do not RESET the endp oint in transferring. (It is avail able in the process
of request that needs USB_RESET to that endpoint.)