Motorola MCF5281, MCF5282 user manual Emdio, Vddpll

Overview

Table 14-2. MCF5282 Alphabetical Signal Index (Continued)

	Abbreviation	Function	I/O
EMDIO		Transfers control information between the external PHY and	I/O
		the media access controller.
ERXCLK		Provides a timing reference for ERXDV, ERXD[3:0], and	I
		ERXER.
ERXD[3:1]		Contain the Ethernet input data transferred from the PHY to the	I
		media access controller (when ERXDV is asserted in MII
		mode).
ERXD0		Ethernet input data transferred from the PHY to the media	I
		access controller (when ERXDV is asserted).
ERXDV		Asserted to indicate that the PHY has valid nibbles present on	I
		the MII.
ERXER		Indicates (when asserted with ERXDV) that the PHY has	I
		detected an error in the current frame.
ETXCLK		Provides a timing reference for ETXEN, ETXD[3:0], and	I
		ETXER.
ETXD[3:1]		Contain the serial output Ethernet data.	O
ETXD0		Serial output Ethernet data.	O
ETXEN		Indicates when valid nibbles are present on the MII.	O
ETXER		Asserted (for one or more E_TXCLKs while ETXEN is also	O
		asserted) to cause the PHY to send one or more illegal
		symbols.
EXTAL		Driven by an external clock except when used as a connection	I
		to the external crystal.
VDDF, VSSF		Supply power and ground to Flash array.	I
VPP		Used for Flash stress testing.	I
GPTA[3:0]		Provide the external interface to the timer A functions.	I/O
GPTB[3:0]		Provide the external interface to the timer B functions.	I/O
Ground		Negative supply.
		External interrupt sources.	I
IRQ[7:1]
JTAG_EN		Selects between multiplexed debug module and JTAG signals	I
		at reset.
		Indicates when an external device can drive data on the bus.	O
OE
VDDPLL		Isolate the PLL analog circuitry from digital power supply noise.	I
VDD		Supplies positive power to the core logic and I/O pads.	I
PST[3:0]		Indicate core status.	O
VRH, VRL		High (VRH) and low (VRL) reference potentials for the analog	I
		converter.
VDDA, VSSA		Isolate the QADC analog circuitry from digital power supply	I
		noise.

MOTOROLA Chapter 14. Signal Descriptions 14-9