NXP Semiconductors QorIQ T1040 - 2.13 USB interface

The enhanced SD host controller (eSDHC) provides an interface between the host system
and SD/MMC cards. Booting from the eSDHC interface is supported via the processor’s
on-chip ROM.
On the RDB, a single connector is used for both SD and MMC memory cards as shown
in the figure below.
T1040
SDHC_WP
SDHC_CD
SDHC_CLK
SDHC_CMD
SDHC_D
AT[0:3]
Clamping
diodes
1V83V3
WP
CD
CLK
CMD
DAT[0:3]
SD Card
Figure 2-13. SDHC connection
2.13 USB interface
The T1040RDB board consists of two integrated USB 2.0 controllers that allow direct
connection to the USB ports with appropriate protection circuitry and power supplies.
The USB features are as follows:
•
High-speed (480 Mbit/s), full-speed (12 Mbit/s), and low-speed (1.5 Mbit/s)
operation
• Host mode
• Dual stacked Type A connection
The USB ports are connected to a standard Type A connector (USB1 and USB2) for
compatibility with most USB peripherals.
Power for the ports is provided by a MIC2506YM switch, which supplies 5 V at up to 1
A per port. The power-enable and power-fault-detect pins are connected directly to the
T1040 for individual port management.
The figure below shows the USB connectivity on the T1040RDB board.
Chapter 2 Architecture
QorIQ T1040 Reference Design Board User Guide, Rev. 0, 06/2015
Freescale Semiconductor, Inc. 29