35 / 48 page
CY7C64013
CY7C64113
Document #: 38-08001 Rev. **
Page 35 of 48
Figure 18-5. Token/Data Packet Flow Diagram
1. IN Token
H
O
S
T
D
E
V
I
C
E
Token Packet
S
Y
N
C
I
N
A
D
D
R
E
N
D
P
C
R
C
5
Data Packet
S
Y
N
C
D
A
T
A
1
C
R
C
1
6
data
H/S Pkt
Token Packet
S
Y
N
C
I
N
A
D
D
R
E
N
D
P
C
R
C
5
S
Y
N
C
A
C
K
H/SPkt
S
Y
N
C
NAK/
STALL
update
2. OUT or SETUP Token without CRC error
Token Packet
S
Y
N
C
O
U
T
A
D
D
R
E
N
D
P
C
R
C
5
Data Packet
S
Y
N
C
D
A
T
A
1
C
R
C
1
6
data
Set
up
H/S Pkt
S
Y
N
C
ACK,
NAK,
STALL
3. OUT or SETUP Token with CRC error
Token Packet
S
Y
N
C
O
U
T
A
D
D
R
E
N
D
P
C
R
C
5
Set
up
Data Packet
S
Y
N
C
D
A
T
A
1
C
R
C
1
6
data
update only if FIFO is
Written (see Table 20-3)
update
a)
b)
update
Setup
update only if FIFO is
Written (see Table 19-3)
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