Revision 1.29 – May 07, 2008
440EP – PPC440EP Embedded Processor
Data Sheet
Table 8. Signal Functional Description (Sheet 6 of 9)
Notes:
1. Receiver input has hysteresis
2. Must pull up (recommended value is 3kΩ to 3.3V)
3. Must pull down (recommended value is 1kΩ)
4. If not used, must pull up (recommended value is 3kΩ to 3.3V)
5. If not used, must pull down (recommended value is 1kΩ)
6. Strapping input during reset; pull-up or pull-down required
Signal Name
Description
I/O
Type
Notes
USB/UTMI Peripheral Interface
3.3V tolerant
2.5V CMOS
USB2DI0:7
USB2DO0:7
USB2TxRdy
USB2RxAct
USB2RxDV
USB2RxErr
USB2LS0
Unidirectional data inputs.
Unidirectional data outputs.
Transmit data ready.
Receive active.
I
O
I
5
3.3V tolerant
2.5V CMOS
3.3V tolerant
2.5V CMOS
3.3V tolerant
2.5V CMOS
I
3.3V tolerant
2.5V CMOS
Receive data valid.
Receive error.
I
3.3V tolerant
2.5V CMOS
I
3.3V tolerant
2.5V CMOS
Line state 0.
I
2
3.3V tolerant
2.5V CMOS
USB2LS1
Line state 1.
I
3.3V tolerant
2.5V CMOS
USB2TxVal
USB2Susp
USB2XcvrSel
USB2TermSel
USB2OM0:1
Transmit valid.
O
O
O
O
O
I/O
3.3V tolerant
2.5V CMOS
Suspend.
3.3V tolerant
2.5V CMOS
Transceiver select.
Termination select.
Operational mode.
3.3V tolerant
2.5V CMOS
3.3V tolerant
2.5V CMOS
5V tolerant
USB1HostXcvr
USB1HostXcvr
USB 1.1 Host differential transceiver.
USB 1.1 Device differential transceiver.
5
5
5
USB diff xcvr
5V tolerant
USB1DevXcvr
USB1DevXcvr
I/O
I
USB diff xcvr
USB 2.0 Clock
3.3V tolerant
2.5V CMOS
USB2Clk
USB1Clk
Requires 60MHz signal for operation in 1.1 or 2.0 mode.
USB 1.1 Host Clock (48MHz)
3.3V tolerant
2.5V CMOS
I
Note: If not used for USB, must be connected to a clock signal with
a frequency between 32kHz and 48MHz.
AMCC Proprietary
57
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
