TUSB2136 datasheet(21/53 Pages) TI

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2−8

2.4.3

OEPBCTX_n: Output Endpoint X-Byte Count (n = 1 to 3)

210

NAK

R/W

BIT

NAME

RESET

FUNCTION

6−0

C[6:0]

X-buffer byte count:

000 0000b

³ Count = 0

000 0001b

³ Count = 1 byte

011 1111b

³ Count = 63 bytes

100 0000b

³ Count = 64 bytes

Any value

≥ 100 0001b produces unpredictable results.

NAK

NAK= 0 No valid data in buffer. Ready for host out

NAK= 1 Buffer contains a valid packet from host (host-out request is NAK)

2.4.4

OEPBBAY_n: Output Endpoint Y-Buffer Base-Address (n = 1 to 3)

210

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. UBM or DMA uses this value as the start address of a given transaction. Furthermore, UBM or DMA

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

2.4.5

OEPBCTY_n: Output Endpoint Y-Byte Count (n = 1 to 3)

210

NAK

R/W

BIT

NAME

RESET

FUNCTION

6−0

C[6:0]

Y-buffer byte count:

000 0000b

³ Count = 0

000 0001b

³ Count = 1 byte

011 1111b

³ Count = 63 bytes

100 0000b

³ Count = 64 bytes

Any value

≥ 100 0001b produces unpredictable results.

NAK

NAK= 0 No valid data in buffer. Ready for host out

NAK= 1 Buffer contains a valid packet from host (host-out request is NAK)

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