CY7C68034-56LTXI データシートの表示（PDF） - Cypress Semiconductor
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CY7C68034-56LTXI Datasheet PDF : 40 Pages
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CY7C68033/CY7C68034
Endpoint RAM
Size
■ 3 × 64 bytes (Endpoints 0 and 1)
■ 8 × 512 bytes (Endpoints 2, 4, 6, 8)
Organization
■ EP0
❐ Bidirectional endpoint zero, 64-byte buffer
■ EP1IN, EP1OUT
❐ 64-byte buffers, bulk or interrupt
■ EP2, 4, 6, 8
❐ Eight 512-byte buffers, bulk, interrupt, or isochronous.
❐ EP4 and EP8 can be double buffered, while EP2 and 6 can
be either double, triple, or quad buffered.
For high speed endpoint configuration options, see Figure 8.
Setup Data Buffer
A separate 8-byte buffer at 0xE6B8-0xE6BF holds the setup data
from a CONTROL transfer.
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 1 of
the 12 configurations shown in the vertical columns. When
operating in full speed bulk mode, only the first 64 bytes of each
buffer are used. For example, in high speed the max 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. The following is an example
endpoint configuration:
EP2–1024 double buffered; EP6–512 quad buffered (column 8
in Figure 8).
EP0 IN&OUT 64
64
64
EP1 IN 64
64
64
EP1 OUT 64
64
64
Figure 8. Endpoint Configuration
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
EP2
512
512
EP2
512
512
EP2
512
512
EP4
512
512
EP4
512
512
EP4
512
512
EP6
512
512
EP8
512
512
EP6
512
512
512
512
EP6
1024
1024
1
2
3
EP2
512
512
EP2
512
512
EP2
512
512
512 512 512
512 512 512
EP6
512
512
EP8
512
512
4
EP6
512
512
512
512
5
EP6
1024
1024
6
EP2
1024
EP2
1024
EP2
1024
1024 1024 1024
EP6
512
512
EP8
512
512
7
EP6
512
512
512
512
8
EP6
1024
1024
9
EP2
512
512
512
EP2 EP2
1024
1024
EP6
512
1024
1024
512
1024
1024 1024
512
EP8
512
512
EP8
512 1024
512
10 11 12
Document Number: 001-04247 Rev. *J
Page 11 of 40
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