Cypress EZ-OTG CY7C67200 用户手册
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.
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.
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.
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.
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
. 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.
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.
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]