MCF5272 Datasheet, PDF (6/24 Pages) Motorola, Inc – MCF5272 ColdFire Integrated Microprocessor Users Manual

TransDimension Inc.
1. Introduction
Interfacing OTG243 to Motorola MCF5272 ColdFire Processor
1.1 System Overview
TransDimension’s OTG243 is a low cost, high-performance, easily programmable device
designed specifically for embedded USB host, USB function, and USB On-The-Go (OTG) dual
role device (DRD) applications. It can be configured to operate as:
ƒ A standard USB OTG DRD controller (Port 1) and a standard USB 2-port host controller
(Port 2 and Port 3).
ƒ A standard USB 2-port host controller (Port 2 and Port 3), and a standard USB function
controller (Port 1).
ƒ A standard USB 3-port host controller (Port 1, Port 2 and Port 3).
The chip is designed for the embedded USB applications, especially mobile and post-PC
products, including cell phones, palm platforms, personal digital assistants, set top boxes, home
gateway systems, and Internet appliances. Peer-to-Peer communication is made simple with the
OTG243 as USB connectivity may be achieved without the intervention of a personal computer.
The block diagram for the OTG243 is shown below.
OSC₁
OSC₂
/RESET
/CS
/WR
/RD
DRQ₁
DACK₁
EOT₁
DRQ₀
DACK₀
EOT₀
A₈:A₂
D₃₁:D₀
INT
WAKEUP
/EXVBO
TEST
PLL
PSC
48 MHz
12 MHz
System
Configuration
&
Control
Registers
µP
Interface
USB Function
Controller
Registers
Memory
Blocks
Test
Control
USB Host
Controller
Registers
Charge Pump
&
VBus Control
Circuit
PSH
PSF
HNP/ SRP
Logic
USB
Function
Control
Logic
Function H/F
SIE
PSH
Host
USB
Host
Control
Logic
SIE
&
Root
Hub
OTG
Trans-
ceiver
USB
Trans-
ceiver
USB
Trans-
ceiver
CEX₁
CEX₂
VFB
VBUS
VBP
ID
RPU
DM₁
DP₁
DM₂
DP₂
DM₃
DP₃
/PO
/OC
Figure 1: OTG243 block diagram
1