M68HC08 datasheet(170/332 Pages) FREESCALE

170 / 332 page

Universal Serial Bus Module (USB)

Technical Data

MC68HC908JB16 — Rev. 1.1

170

Universal Serial Bus Module (USB)

Freescale Semiconductor

Each USB transaction is comprised of a series of packets. The USB

module supports the packet types shown in Figure 11-4. Token packets

are generated by the USB host and decoded by the USB device. Data

and handshake packets are both decoded and generated by the USB

device, depending on the type of transaction.

Figure 11-4. Supported USB Packet Types

The following sections detail each segment used to form a complete

USB transaction.

11.5.1.1 Sync Pattern

The NRZI bit pattern shown in Figure 11-5 is used as a synchronization

pattern and is prefixed to each packet. This pattern is equivalent to a

data pattern of seven 0s followed by a 1 ($80).

Figure 11-5. Sync Pattern

Token Packet:

OUT

SYNC

PID

ADDR

ENDP

CRC5

EOP

SETUP

Data Packet:

DATA0

SYNC

PID

DATA

CRC16

EOP

DATA1

0 – 8 Bytes

Handshake Packet:

ACK

NAK

SYNC

PID

EOP

STALL

SYNC PATTERN

PID0 PID1

Idle

NRZI Data

Encoding

M68HC08 Datasheet(PDF) 170 Page - Freescale Semiconductor, Inc

M68HC08 Datasheet(HTML) 170 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL