Specifications

CY7C68053
Document # 001-06120 Rev *J Page 8 of 42
3.12.4 Endpoint Configurations (High Speed Mode)
Endpoints 0 and 1 are the same for every configuration. Endpoint
0 is the only CONTROL endpoint, and endpoint 1 can be either
BULK or INTERRUPT. The endpoint buffers can be configured
in any one of the 12 configurations shown in the vertical columns
of Figure 5. When operating in full speed BULK mode only the
first 64 bytes of each buffer are used. For example, in high speed
the maximum packet size is 512 bytes, but in full speed it is 64
bytes. Even though a buffer is configured to be a 512 byte buffer,
in full speed only the first 64 bytes are used. The unused
endpoint buffer space is not available for other operations. An
example endpoint configuration is:
EP2–1024 double buffered; EP6–512 quad buffered (column 8).
3.12.5 Default Full Speed Alternate Settings
64
64
64
512
512
1024
1024
1024
1024
1024
1024
1024
512
512
512
512
512
512
512
512
512
512
EP2
EP2
EP2
EP6
EP6
EP8
EP8
EP0 IN&OUT
EP1 IN
EP1 OUT
Figure 5. Endpoint Configuration
1024
1024
EP6
1024
512
512
EP8
512
512
EP6
512
512
512
512
EP2
512
512
EP4
512
512
EP2
512
512
EP4
512
512
EP2
512
512
EP4
512
512
EP2
512
512
512
512
EP2
512
512
512
512
EP2
512
512
1024
EP2
1024
1024
EP2
1024
1024
EP2
1024
512
512
EP6
1024
1024
EP6
512
512
EP8
512
512
EP6
512
512
512
512
EP6
1024
1024
EP6
512
512
EP8
512
512
EP6
512
512
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
64
1
2
3
4
5
6
7
8
9
10
11
12
Table 4. Default Full Speed Alternate Settings
[3, 4]
Alternate Setting 0 1 2 3
ep0 64 64 64 64
ep1out 0 64 bulk 64 int 64 int
ep1in 0 64 bulk 64 int 64 int
ep2 0 64 bulk out (2×) 64 int out (2×) 64 iso out (2×)
ep4 0 64 bulk out (2×) 64 bulk out (2×) 64 bulk out (2×)
ep6 0 64 bulk in (2×) 64 int in (2×) 64 iso in (2×)
ep8 0 64 bulk in (2×) 64 bulk in (2×) 64 bulk in (2×)
Notes
3. ‘0’ means ‘not implemented.’
4. ‘2×’ means ‘double buffered.’
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