Samsung S3C2451X User Manual page 374

USB2.0 DEVICE
BLOCK DIAGRAM
AHB
Master/Slave
Interface
USB 2.0 Function
AHB
Master/Slave
Interface
USB2.0 Function has a AHB Slave which provides the microcontroller with read and write access to the Control
and Status Registers. And also Function has an AHB Master to enable the link to transfer data on the AHB. The
S3C2451x USB system shown as Figure 17-1, can be configured as following :
1. USB 1.1 Host 1 Port & USB 2.0 Device 1 Port
2. USB 1.1 Host 2 Ports
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
17-2
Specifications and information herein are subject to change without notice.
PHY Clock
UTMI Interface
Serial Interface
USB 1.1
Host
PHY or Internal
Clock
(48Mhz)
Serial Interface 2
Figure 17-1. USB2.0 Block Diagram
System
Controller
SFR setting
(30Mhz)
USB 2.0 PHY
Control Block
PHY Clock
(48Mhz or
30Mhz)
USB 2.0
PHY
USB 1.1
Transceiver
S3C2451X RISC MICROPROCESSOR
Internal Clock
(48Mhz)
PHY Control Signal
DP
External
USB HOST
or Device
DM
DP
DN