M68HC08 datasheet(194/332 Pages) FREESCALE

194 / 332 page

Universal Serial Bus Module (USB)

Technical Data

MC68HC908JB16 — Rev. 1.1

194

Universal Serial Bus Module (USB)

Freescale Semiconductor

ISTALL0 — Endpoint 0 Force STALL Bit for IN token

This read/write bit causes endpoint 0 to return a STALL handshake

when polled by an IN token by the USB host controller. The USB

hardware clears this bit when a SETUP token is received. Reset

clears this bit.

1 = Send STALL handshake

0 = Default

PULLEN — Pull-up Enable

This read/write bit controls the pull-up option for the USB D– pin if the

USB module is enabled.

1 = Configure D– pin to have internal pull-up

0 = Disconnect D– pin internal pull-up

ENABLE2 — Endpoint 2 Enable

This read/write bit enables endpoint 2 and allows the USB to respond

to IN or OUT packets addressed to endpoint 2. Reset clears this bit.

1 = Endpoint 2 is enabled and can respond to an IN or OUT token

0 = Endpoint 2 is disabled

ENABLE1 — Endpoint 1 Enable

This read/write bit enables endpoint 1 and allows the USB to respond

to IN packets addressed to endpoint 1. Reset clears this bit.

1 = Endpoint 1 is enabled and can respond to an IN token

0 = Endpoint 1 is disabled

M68HC08 Datasheet(PDF) 194 Page - Freescale Semiconductor, Inc