Motorola ColdFire MCF5281 User Manual
Page 249

Signal Descriptions
Freescale Semiconductor
14-9
EMDC
Provides a timing reference to the PHY for data transfers on the
EMDIO signal.
Note: Not available on MCF5214 and MCF5216
O
EMDIO
Transfers control information between the external PHY and the
media access controller.
Note: Not available on MCF5214 and MCF5216
I/O
ERXCLK
Provides a timing reference for ERXDV, ERXD[3:0], and
ERXER.
Note: Not available on MCF5214 and MCF5216
I
ERXD[3:1]
Contain the Ethernet input data transferred from the PHY to the
media access controller (when ERXDV is asserted in MII mode).
Note: Not available on MCF5214 and MCF5216
I
ERXD0
Ethernet input data transferred from the PHY to the media
access controller (when ERXDV is asserted).
Note: Not available on MCF5214 and MCF5216
I
ERXDV
Asserted to indicate that the PHY has valid nibbles present on
the MII.
Note: Not available on MCF5214 and MCF5216
I
ERXER
Indicates (when asserted with ERXDV) that the PHY has
detected an error in the current frame.
Note: Not available on MCF5214 and MCF5216
I
ETXCLK
Provides a timing reference for ETXEN, ETXD[3:0], and ETXER.
Note: Not available on MCF5214 and MCF5216
I
ETXD[3:1]
Contain the serial output Ethernet data.
Note: Not available on MCF5214 and MCF5216
O
ETXD0
Serial output Ethernet data.
Note: Not available on MCF5214 and MCF5216
O
ETXEN
Indicates when valid nibbles are present on the MII.
Note: Not available on MCF5214 and MCF5216
O
ETXER
Asserted (for one or more E_TXCLKs while ETXEN is also
asserted) to cause the PHY to send one or more illegal symbols.
Note: Not available on MCF5214 and MCF5216
O
EXTAL
Driven by an external clock except when used as a connection
to the external crystal.
I
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.
IRQ[7:1]
External interrupt sources.
I
Table 14-2. MCF5282 Alphabetical Signal Index (continued)
Abbreviation
Function
I/O
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3