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CY7C68013A-56BAXC Datasheet(PDF) 11 Page - Cypress Semiconductor |
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CY7C68013A-56BAXC Datasheet(HTML) 11 Page - Cypress Semiconductor |
11 / 66 page CY7C68013A, CY7C68014A CY7C68015A, CY7C68016A Document #: 38-08032 Rev. *V Page 11 of 66 2.12 Endpoint RAM 2.12.1 Size ■ 3 × 64 bytes (Endpoints 0 and 1) ■ 8 × 512 bytes (Endpoints 2, 4, 6, 8) 2.12.2 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; EP2 and 6 can be either double, triple, or quad buffered. For high speed endpoint configuration options, see Figure 2-5. 2.12.3 Setup Data Buffer A separate 8 byte buffer at 0xE6B8-0xE6BF holds the setup data from a CONTROL transfer. 2.12.4 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 1 of the 12 configurations shown in the vertical columns. When operating in the 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 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 the EP2–1024 double buffered; EP6–512 quad buffered (column 8). Figure 2-5. Endpoint Configuration 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 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 |
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