MPC8536E-ANDROID Freescale Semiconductor, MPC8536E-ANDROID Datasheet - Page 1464

• Manufacturer Part Number: MPC8536E-ANDROID
• Description: HARDWARE/SOFTWARE ANDROID OS
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC ™r
• Type: MPUr

Specifications of MPC8536E-ANDROID

• Contents: Board
• For Use With/related Products: MPC8536
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Universal Serial Bus Interfaces
21.8.3.4
The behaviors of the device controller for interrupt and bulk endpoints are identical. All valid IN and OUT
transactions to bulk pipes will handshake with a NAK unless the endpoint had been primed. Once the
endpoint has been primed, data delivery will commence.
A dTD will be retired by the device controller when the packets described in the transfer descriptor have
been completed. Each dTD describes N packets to be transferred according to the USB Variable Length
transfer protocol. The formula and table on the following page describe how the device controller
computes the number and length of the packets to be sent/received by the USB vary according to the total
number of bytes and maximum packet length.
With Zero Length Termination (ZLT) = 0
With Zero Length Termination (ZLT) = 1
TX-dTD is complete when:
RX-dTD is complete when:
21-130
•
•
All packets described dTD were successfully transmitted. *** Total bytes in dTD will equal zero
when this occurs.
All packets described in dTD were successfully received. *** Total bytes in dTD will equal zero
when this occurs.
N = INT(number of bytes/max. packet length) + 1
N = MAXINT(number of bytes/max. packet length)
Interrupt/Bulk Endpoint Operational Model
The MULT field in the dQH must be set to ‘00’ for bulk, interrupt, and
control endpoints.
MPC8536E PowerQUICC III Integrated Processor Reference Manual, Rev. 1
Table 21-85. Variable Length Transfer Protocol Example (ZLT = 0)
Table 21-86. Variable Length Transfer Protocol Example (ZLT = 1)
Bytes
Bytes
(dTD)
(dTD)
511
512
512
511
512
512
Max. Packet
Max. Packet
Length
Length
(dQH)
(dQH)
256
256
512
256
256
512
N
N
2
3
2
2
2
1
NOTE
256
256
512
256
256
512
P1
P1
255
256
255
256
P2
P2
0
P3
P3
0
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