Revision 1.26 – October 15, 2007
440EPx – PPC440EPx Embedded Processor
Preliminary 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 OV
(EOV
for Ethernet)
DD
DD
3. Must pull down (recommended value is 1kΩ)
4. If not used, must pull up (recommended value is 3kΩ to OV
(EOV
for Ethernet)
DD
DD
5. If not used, must pull down (recommended value is 1kΩ)
6. Strapping input during reset; pull-up or pull-down required
Signal Name
Ethernet Interface
Description
I/O
Type
Notes
GMCRxD0:1,
GMC0RxD0:1,
SMII0:1RxD
GMII/MII: Receive data.
RGMII 0: Receive data.
SMII 0:1: Receive data.
3.3V tolerant
2.5V CMOS
I
1
GMCRxD2:3
GMC0RxD2:3
GMII/MII: Receive data.
RGMII 0: Receive data.
3.3V tolerant
2.5V CMOS
I
I
1
1
GMCRxD4:7,
GMC1RxD0:3
GMII/MII: Receive data.
RGMII 1: Receive data.
3.3V tolerant
2.5V CMOS
GMCTxD0:1,
GMC0TxD0:1,
SMII0:1TxD
GMII/MII: Transmit data.
RGMII 0: Transmit data.
SMII 0:1: Transmit data.
3.3V tolerant
2.5V CMOS
O
GMCTxD2:3,
GMC0TxD2:3
GMII/MII: Transmit data.
RGMII 0: Transmit data.
3.3V tolerant
2.5V CMOS
O
O
I
1
1
1
GMCTxD4:7,
GMC1TxD0:3
GMII/MII: Transmit data.
RGMII 1: Transmit data.
3.3V tolerant
2.5V CMOS
GMCRxEr,
GMC1RxCtl
GMII/MII: Receive error.
RGMII 1: Receive control.
3.3V tolerant
2.5V CMOS
GMCRxClk,
GMC0RxClk,
SMIISync
GMII/MII: Receive clock.
RGMII 0: Receive clock.
SMII: Synchronizing signal.
3.3V tolerant
2.5V CMOS
I
1, 5
GMCRxDV,
GMC0RxCtl
GMII/MII: Receive data valid.
RGMII 0: Receive control.
3.3V tolerant
2.5V CMOS
I
I/O
O
O
O
I
1
1
GMCCrS,
GMC1TxClk
GMII/MII: Carrier sense.
RGMII 1: Transmit clock.
3.3V tolerant
2.5V CMOS
GMCTxEr,
GMC1TxCtl
GMII/MII: Transmit error.
RGMII 1: Transmit control.
3.3V tolerant
2.5V CMOS
GMCTxEn,
GMC0TxCtl
GMII/MII: Transmit enable.
RGMII 0: Transmit control.
3.3V tolerant
2.5V CMOS
3.3V tolerant
2.5V CMOS
GMCTxClk
MII: Transmit clock for MII.
1, 5
1, 5
GMCCD,
GMC1RxClk
GMII/MII: Collision detect.
RGMII 1: Receive clock.
3.3V tolerant
2.5V CMOS
3.3V tolerant
2.5V CMOS
GMCMDClk
GMCMDIO
Management data clock
Management data I/O
O
I/O
O
3.3V tolerant
2.5V CMOS
GMCGTxClk,
GMC0TxClk
GMII: Transmit clock for GMII.
RGMII 0: Transmit clock.
3.3V tolerant
2.5V CMOS
3.3V tolerant
2.5V CMOS
Rcvr
GMCRefClk,
SMIIRefClk
GMII, RGMII: Reference clock.
SMII: Reference clock.
I
I
1, 5
1, 5
3.3V tolerant
2.5V CMOS
RejectPkt0:1
External request to reject a packet.
AMCC Proprietary
59
AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
