mc68hc908jb16 Freescale Semiconductor, Inc, mc68hc908jb16 Datasheet - Page 171

• Manufacturer Part Number: mc68hc908jb16
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

11.5.1.2 Packet Identifier Field
MC68HC908JB16
Freescale Semiconductor
—
Rev. 1.1
The start of a packet (SOP) is signaled by the originating port by driving
the D+ and D– lines from the idle state (also referred to as the J state) to
the opposite logic level (also referred to as the K state). This switch in
levels represents the first bit of the sync field.
data signaling and voltage levels for the start of packet and the sync
pattern.
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 11-2
types.
V
V
V
V
OH
SE
SE
OL
(max)
(min.)
(min.)
(min.)
V
SS
Figure 11-6. SOP, Sync Signaling, and Voltage Levels
Universal Serial Bus Module (USB)
BUS IDLE
shows the packet identifier values for the supported packet
Packet Identifier Value
Table 11-2. Supported Packet Identifiers
SOP
%1001
%0001
%1101
%0011
%1011
%0010
%1010
%1110
FIRST BIT OF PACKET
Packet Identifier Type
STALL Handshake
ACK Handshake
NAK Handshake
SETUP Token
DATA0 Packet
DATA1 Packet
Universal Serial Bus Module (USB)
OUT Token
IN Token
Figure 11-6
END OF SYNC
shows the
Technical Data
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