MPC850 Sipex Corporation, MPC850 Datasheet

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MPC850

Manufacturer Part Number
MPC850
Description
Connecting SP5301 to MPC850 PowerQUICC
Manufacturer
Sipex Corporation
Datasheet

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Processors in the Motorola MPC850 PowerQUICC™ 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.
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
Rev. 7/15/2004
48MHz Ref. Clock
Connecting SP5301 to MPC850 PowerQUICC™
Controller
PowerQUICC
12Mbps
Host
USB
Motorola
MPC850
Dir
USBRXM (10)
USBRXD (15)
USBOE# (14)
USBRXP (11)
USBTXP (7)
USBTXN (6)
Signal
SP5301
VMO
VPO
OE#
RCV
VP
VM
SUSP
SPEED
RERR
RSE0
Not shown:
0.1uF Bypass capacitor on Vcc
Float RERR and RSE0 (No Connect)
APPLICATION NOTE
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
NC
SUSPND
RERR
RCV
GND
© Copyright 2004 Sipex Corporation
/OE
VM
VP
SP5301
SIPEX
SPEED
RSE0
VMO
VPO
Vcc
D+
D-
NC
1.5K
+3.3V
Vcc =
+3.3V
Vcc =
ohm
22
V_BUS =
+5V
Connector
V_BUS
GND
USB
D+
D-

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