HC08KL8GRSSLASHD datasheet(110/256 Pages) NXP

110 / 256 page

Universal Serial Bus Module (USB)

General Release Specification

MC68HC08KL8 — Rev. 2.0

Universal Serial Bus Module (USB)

9.3.1.2 Packet Identifier Field

The packet identifier field is an 8-bit number comprised of the 4-bit

packet identification and its complement. The field follows the sync

pattern and determines the direction and type of transaction on the bus.

Table 9-1 shows the packet identifier values for the supported packet

types.

9.3.1.3 Address Field (ADDR)

The address field is a 7-bit number that is used to select a particular USB

device. This field is compared to the lower seven bits of the UADDR

MC68HC08KL8 USB device.

9.3.1.4 Endpoint Field (ENDP)

The endpoint field is a 4-bit number that is used to select a particular

endpoint within a USB device. For the MC68HC08KL8, this will be a

binary number between 0 and 2 inclusive. Any other value will cause the

transaction to be ignored.

Table 9-1. Supported Packet Identiﬁers

Packet Identifier Value

Packet Identifier Type

%1001

IN Token

%0001

OUT Token

%1101

SETUP Token

%0011

DATA0 Packet

%1011

DATA1 Packet

%0010

ACK Handshake

%1010

NAK Handshake

%1110

STALL Handshake

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

HC08KL8GRS/D Datasheet(PDF) 110 Page - NXP Semiconductors