Cypress EZ-OTG CY7C67200 - Manual (Page 23)

CY7C67200
Document #: 38-08014 Rev. *G Page 23 of 78
ACK Flag (Bit 0)
The ACK Flag bit indicates two different conditions depending
on the transfer type. For non-Isochronous transfers, this bit
represents a transaction ending by receiving or sending an
ACK packet. For Isochronous transfers, this bit represents a
successful transaction that will not be represented by an ACK
packet.
1: For non-Isochronous transfers, the transaction was ACKed.
For Isochronous transfers, the transaction was completed
successfully.
0: For non-Isochronous transfers, the transaction was not
ACKed. For Isochronous transfers, the transaction was not
completed successfully.
Host n PID Register [W]
• Host 1 PID Register 0xC086
• Host 2 PID Register 0xC0A6
Figure 22. Host n PID Register
Register Description
The Host n PID register is a write-only register that provides
the PID and Endpoint information to the USB SIE to be used
in the next transaction.
PID Select (Bits [7:4])
The PID Select field defined as in Table 26 . ACK and NAK
tokens are automatically sent based on settings in the Host n
Control register and do not need to be written in this register.
Endpoint Select (Bits [3:0])
The Endpoint field allows addressing of up to 16 different
endpoints.
Reserved
All reserved bits must be written as ‘0’.
Bit # 15 14 13 12 11 10 9 8
Field Reserved
Read/Write - - - - - - - -
Default 0 0 0 0 0 0 0 0
Bit # 7 6 5 4 3 2 1 0
Field PID Select Endpoint Select
Read/Write W W W W W W W W
Default 0 0 0 0 0 0 0 0
Table 26.PID Select Definition
PID TYPE PID Select [7:4]
set-up 1101 (D Hex)
IN 1001 (9 Hex)
OUT 0001 (1 Hex)
SOF 0101 (5 Hex)
PREAMBLE 1100 (C Hex)
NAK 1010 (A Hex)
STALL 1110 (E Hex)
DATA0 0011 (3 Hex)
DATA1 1011 (B Hex)
Table 26.PID Select Definition (continued)
PID TYPE PID Select [7:4]
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