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MPC8280 Datasheet(PDF) 820 Page - Freescale Semiconductor, Inc

Part # MPC8280
Description  PowerQUICC??II Family Reference Manual
PDF  1386 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC8280 Datasheet(HTML) 820 Page - Freescale Semiconductor, Inc

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Universal Serial Bus Controller
MPC8280 PowerQUICC II Family Reference Manual, Rev. 1
27-4
Freescale Semiconductor
27.4
USB Function Description
As shown in Figure 27-2, the USB function consists of transmitter and receiver sections and a control unit.
The USB transmitter contains four independent FIFOs, each containing 16 bytes. There is a dedicated
FIFO for each of the four supported endpoints. The USB receiver has a single 16-byte FIFO.
USBRXD
I
Receive data. Input to the USB receiver from the differential line receiver.
USBRXP,
USBRXN
I
Gated version of D+ and D–. Used to detect single-ended zeros and the interconnect speed.
Table 27-1. USB Pins Functions (continued)
Signal
I/O
Function
RP
RN
Result
0
0
Single ended “0”
1
0
Full speed
0
1
Low speed
11
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