TUSB3410 datasheet(29/92 Pages) TI

29 / 92 page

4–9

4.3.9

IEPBCTX_n: Input Endpoint X-Byte Count (n = 1 to 3)

765

NAK

R/W

BIT

NAME

RESET

FUNCTION

6–0

C[6:0]

X-Buffer byte count:

X000.0000b Count = 0

X000.0001b Count = 1 byte

X011.1111b Count = 63 bytes

X100.0000b Count = 64 bytes

Any value

≥ 100.0001b may result in unpredictable results.

NAK

NAK = 0

NAK = 1

Buffer contains a valid packet for host-IN transaction

Buffer is empty (gives NAK response to host-OUT request)

4.3.10 IEPBBAY_n: Input Endpoint Y-Buffer Base Address (n = 1 to 3)

765

A10

R/W

BIT

NAME

RESET

FUNCTION

7–0

A[10:3]

A[10:3] of Y-buffer base address (padded with 3 LSB of zeros for a total of 11 bits). This value is set by the

MCU. The UBM or DMA uses this value as the start-address of a given transaction, but note that the UBM

or DMA does not change this value at the end of a transaction.

4.3.11 IEPBCTY_n: Input Endpoint Y-Byte Count (n = 1 to 3)

765

NAK

R/W

BIT

NAME

RESET

FUNCTION

6–0

C[6:0]

Y-Byte count:

X000.0000b Count = 0

X000.0001b Count = 1 byte

X011.1111b Count = 63 bytes

X100.0000b Count = 64 bytes

Any value

≥ 100.0001b may result in unpredictable results.

NAK

NAK =0

NAK = 1

Buffer contains a valid packet for host-IN transaction

Buffer is empty (gives NAK response to host-IN request)

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