M68HC08 datasheet(197/332 Pages) FREESCALE

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Universal Serial Bus Module (USB)

MC68HC908JB16 — Rev. 1.1

Technical Data

Freescale Semiconductor

Universal Serial Bus Module (USB)

197

11.8.11 USB Status Register 1

R2SEQ — Endpoint 2 Receive Sequence Bit

This read-only bit indicates the type of data packet last received for

endpoint 2 (DATA0 or DATA1).

1 = DATA1 token received in last endpoint 2 receive

0 = DATA0 token received in last endpoint 2 receive

TXACK — ACK Token Transmit Bit

This read-only bit indicates that an ACK token has been transmitted.

This bit is updated at the end of the data transmission.

1 = Last token transmitted for endpoint 0 was an ACK token

0 = Last token transmitted for endpoint 0 was not an ACK token

TXNAK — NAK Token Transmit Bit

This read-only bit indicates that a TXNAK token has been transmitted.

This bit is updated at the end of the data transmission.

1 = Last token transmitted for endpoint 0 was a NAK token

0 = Last token transmitted for endpoint 0 was not a NAK token

TXSTL — STALL Token Transmit Bit

This read-only bit indicates that a STALL token has been transmitted.

This bit is updated at the end of the data transmission.

1 = Last token transmitted for endpoint 0 was a STALL token

0 = Last token transmitted for endpoint 0 was not a STALL token

RP2SIZ3–RP2SIZ0 — Endpoint 2 Receive Data Packet Size

These read-only bits store the number of data bytes received for the

last OUT transaction for endpoint 2.

Address:

$003E

Bit 7

654321

Bit 0

Read: R2SEQ

TXACK

TXNAK

TXSTL

RP2SIZ3 RP2SIZ2 RP2SIZ1 RP2SIZ0

Write:

Reset:

000

= Unimplemented

U = Unaffected by reset

Figure 11-25. USB Status Register 2 (USR1)

M68HC08 Datasheet(PDF) 197 Page - Freescale Semiconductor, Inc

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