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MPC850 Datasheet

  • MPC850

  • Connecting SP5301 to MPC850 PowerQUICC

  • 86.16KB

  • 1頁(yè)

  • SIPEX

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APPLICATION NOTE
Connecting SP5301 to MPC850 PowerQUICC鈩?/div>
Processors in the Motorola MPC850 PowerQUICC鈩?family support one USB host port at a
12Mbit/sec data rate. They require an external USB transceiver, such as the
SP5301,
to
provide the analog interface to the Universal Serial Bus.
Motorola
MPC850
PowerQUICC
12Mbps
USB
Host
Controller
48MHz Ref. Clock
USBTXP (7)
USBTXN (6)
USBOE# (14)
USBRXD (15)
USBRXP (11)
USBRXM (10)
NC
RERR
/OE
RCV
SIPEX
VP
SP5301
VM
SUSPND
GND
VMO
VPO
Vcc
D+
D-
SPEED
RSE0
NC
Vcc =
+3.3V
V_BUS =
+5V
USB
Connector
1.5K
V_BUS
D+
D-
GND
22
ohm
Vcc =
+3.3V
Not shown:
0.1uF Bypass capacitor on Vcc
Float RERR and RSE0 (No Connect)
The USB controller on the MPC850 uses six signals. Additional signals such as SUSPEND and
SPEED can be driven using general purpose outputs if desired.
Signal
MPC
USBTXN
USBTXP
USBOE#
USBRXD
USBRXP
USBRXN
Optional
Signals
Dir
鈫?/div>
鈫?/div>
鈫?/div>
鈫?/div>
鈫?/div>
鈫?/div>
鈫?/div>
鈫?/div>
鈫?/div>
鈫?/div>
Signal
SP5301
VMO
VPO
OE#
RCV
VP
VM
SUSP
SPEED
RERR
RSE0
Function
Data outputs from Host, Inputs to Transceiver,
Driven onto D- and D+
Output Enable, controls SP5301 transmit or receive
Differential Receive
Single Ended Receive. Gated version of D+ and D-. Used to
detect Single-ended Zero (EOF and Reset)
Drive high to put SP5301 into low power state
Drive low to adjust driver slew rate for Low Speed (1.5Mbps)
Outputs high if D+ and D- are 11 (illegal state).
Leave unconnected if not used
Outputs high if D+ and D- are 00 (SE0).
Leave unconnected if not used
Rev. 7/15/2004
漏 Copyright 2004 Sipex Corporation

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