Motorola MCF5282 ユーザーズマニュアル

26-4

MOTOROLA

 

The MCF5282 ports control the functionality of several external pins. These pins are listed
in Table 26-1.

D[31:0]

 2

PA, PB, PC, 

PD

—

—

External data bus / Ports A, B, C, D

OE

1

PE[7]

—

—

Output enable for external reads / Port E[7]

TA

1

PE[6]

—

—

Transfer acknowledge for external data transfer / Port E[6]

TEA

1

PE[5]

—

—

Transfer error acknowledge for external data transfer / Port E[5]

R/W

1

PE[4]

—

—

Read/Write indication for external data transfer / Port E[4]

SIZ1

1

PE[3]

SYNCA

—

Size of the external data transfer / Port E[3] / Timer A sync

SIZ0

1

PE[2]

SYNCB

—

Size of the external data transfer / Port E[3:2] / Timer B sync

TS

1

PE[1]

SYNCA

—

Transfer start indication for external data transfer / Port E[1] / Timer A 
sync

TIP

1

PE[0]

SYNCB

—

Transfer in progress indication for external data transfer / Port E[0] / 
Timer B sync

A[23:21]

1

PF[7:5]

CS[6:4]

—

External address bus [23:21] / Port F[7:5] / Chip selects 6–4

A[20:0]

1

PF[4:0], PG, 

PH

—

—

External address bus [20:0] / Ports F[4:0], G, H

BS[3:0]

1

PJ[7:4]

—

—

Byte strobes for external data transfer / Port J[7:4] / SDRAM column 
address strobes

CS[3:0]

1

PJ[3:0]

—

—

Chip selects 3 - 0 / Port J[3:0]

DDATA[3:0]

PDD[7:4]

—

—

Debug data / Port DD[7:4]

PST[3:0]

PDD[7:4]

—

—

Processor status / Port DD[3:0]

ETXCLK

PEH[7]

—

—

Ethernet transmit clock / PEH[7]

ETXEN

PEH[6]

—

—

Ethernet transmit enable / PEH[6]

ETXD[0]

PEH[5]

—

—

Ethernet transmit data [0] / PEH[5]

ECOL

PEH[4]

—

—

Ethernet collision / PEH[4]

ERXCLK

PEH[3]

—

—

Ethernet receive clock / PEH[3]

ERXDV

PEH[2]

—

—

Ethernet receive data valid / PEH[2]

ERXD[0]

PEH[1]

—

—

Ethernet receive data [0] / PEH[1]

ECRS

PEH[0]

—

—

Ethernet carrier receive sense / PEH[0]

ETXD[3:1]

PEL[7:5]

—

—

Ethernet transmit data / Port EL[7:5]

ETXER

PEL[4]

—

—

Ethernet transmit error / Port EL[4]

ERXD[3:1]

PEL[3:1]

—

—

Ethernet receive data [3:1] / Port EL[3:1]