TUSB3210_1 datasheet(22/45 Pages) TI

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2.4.8

IEPBBAX_n: Input Endpoint X-Buffer Base Address (n = 1 to 3)

2.4.9

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

TUSB3210

Universal Serial Bus

General-Purpose Device Controller

SLLS466F – FEBRUARY 2001 – REVISED AUGUST 2007

BIT

NAME

RESET

FUNCTION

ISO

ISO = 0

Non-isochronous transfer. This bit must be cleared by the MCU because only

non-isochronous transfer is supported.

UBME

UBM enable/disable bit. Set/cleared by the MCU.

UBME = 0

UBM cannot use this endpoint.

UBME = 1

UBM can use this endpoint.

A10

R/W

BIT

NAME

RESET

FUNCTION

7–0

A[10:3]

A[10:3] of X-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.

NAK

R/W

BIT

NAME

RESET

FUNCTION

6–0

C[6:0]

X-Buffer Byte count:

000 0000b

→ Count = 0

000 0001b

→ Count = 1 byte

011 1111b

→ Count = 63 bytes

100 0000b

→ Count = 64 bytes

Any value

≥ 100 0001b produces unpredictable results.

NAK

NAK = 0

Buffer contains a valid packet for host-in transaction

NAK = 1

Buffer is empty (host-in request is NAK)

Functional Description

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