TAM-3517 HARDWARE MANUAL rev B
July 3 2012, TechNexion
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8.9
Serial Communication Interfaces – USB Signals Description
The USB Host is connected to the SMSC USB3320 PHY on TAM-3517
The USB3320 is a highly integrated full featured Hi-Speed USB 2.0 transceiver based on
S
MSC’s proven ULPI interface. It supports a wide variety of different reference clock
frequencies with one single part, as well as accepting clocking from crystal/resonators and the
ULPI 60 MHz Clock-In mode. As with previous generations of SMSC's USB transceivers, the
USB3320 integrates a USB switch and both ESD and VBUS over-voltage protection devices.
Note1: USB 1.1 devices can be connected to the USB 2.0 host port only through a USB 2.0 hub.
Note2: Single USB 1.1 devices can be connected directly to the USB OTG port. This port should
however during boot up always be kept in OTG mode.
Note3: It’s not advisable to connect a hub to the USB OTG port.
Note4: ESD decoupling circuits are advised on all USB devices and ports.
USB Host
SIGNAL NAME
DESCRIPTION
TYPE PIN TAM-3517
IDM0
D
– pin of the USB cable
IOA
20
IDP0
D + pin of the USB cable
IOA
22
USB_reset
Reset
O
35
CPEN
External 5V supply enable. Controls the
xternal Vbus power switch.
O
137
VBUS_5V
Power
PWR
21
The AM3517 USB2.0 peripheral supports the following features:
USB 2.0 peripheral at speeds high speed (HS: 480 Mb/s) and full speed (FS: 12 Mb/s)
USB 2.0 host at speeds HS, FS, and low speed (LS: 1.5 Mb/s)
All transfer modes (control, bulk, interrupt, and isochronous)
16 Transmit (TX) and 16 Receive (RX) endpoints in addition to endpoint 0
FIFO RAM
o
32K endpoint
o
Programmable size
Integrated USB 2.0 High Speed PHY
Connects to a standard Charge Pump for VBUS 5 V generation
RNDIS mode for accelerating RNDIS type protocols using short packet termination over
USB
USB OTG
SIGNAL NAME
DESCRIPTION
TYPE PIN TAM-3517
USB0_DM
USB data N/USB carkit transmit data
IO
140
USB0_DP
USB data P/USB carkit receive data
IO
138
USB0_ID
USB ID
IO
136
USB0_VBUS
Power
PWR
13
Note: It is advised to use USB OTG only for USB OTG
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