Revision 1.29 – May 07, 2008
440EP – PPC440EP Embedded Processor
Data Sheet
Table 8. Signal Functional Description (Sheet 3 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
Ethernet Interface
MII: Collision detection.
RMII1: Receive error.
3.3V tolerant
2.5V CMOS
EMCCD, EMC1RxErr
EMCCrS, EMC0CrsDV
EMCDV, EMC1CrsDV
EMCMDClk
I/O
I/O
I/O
O
MII: Carrier sense.
RMII0: Carrier sense data valid.
3.3V tolerant
2.5V CMOS
MII: Data valid.
RMII1: Carrier sense data valid.
3.3V tolerant
2.5V CMOS
3.3V tolerant
2.5V CMOS
MII, RMII, and SMII: Management data clock.
MII, RMII, and SMII: Transfer command and status information
with PHY.
3.3V tolerant
2.5V CMOS
EMCMDIO
I/O
I/O
3.3V tolerant
2.5V CMOS
EMCRxClk
MII: Receive clock.
EMCRxD0:1,
EMC0RxD0:1
EMC0:1RxD
MII: Receive data.
RMII0: Receive data.
SMII0 and SMII1: Receive data.
3.3V tolerant
2.5V CMOS
I/O
EMCRxD2:3,
EMC1RxD0:1
MII: Receive data.
RMII1: Receive data.
3.3V tolerant
2.5V CMOS
I/O
I/O
EMCRxErr,
EMC0RxErr
MII: Receive error.
RMII0: Receive error.
3.3V tolerant
2.5V CMOS
MII: Transmit clock.
EMCTxClk,
EMCRefClk
3.3V tolerant
2.5V CMOS
I
SMII: Reference clock (125MHz).
RMII: Reference clock (50MHz).
EMCTxD0:1,
EMC0TxD0:1
EMC0:1TxD
MII: Transmit data.
RMII0: Transmit data.
SMII0 and SMII1: Transmit data.
3.3V tolerant
2.5V CMOS
I/O
I/O
EMCTxD2:3,
EMC1TxD0:1
MII: Transmit data.
RMII1: Transmit data.
3.3V tolerant
2.5V CMOS
MII: Transmit data enabled.
RMII0: Transmit data enabled.
SMII: Sync signal. (Note: Redrive EMCSync when driving more
than one load. EMCSync is a weak driver).
EMCTxEn,
EMC0TxEn,
EMCSync
3.3V tolerant
2.5V CMOS
O
EMCTxErr,
EMC1TxEn
MII: Transmit error.
RMII1: Transmit data enabled.
3.3V tolerant
2.5V CMOS
I/O
I
3.3V tolerant
2.5V CMOS
RejectPkt
External request to reject a packet.
54
AMCC Proprietary
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
