External Signal Description; Mcf5282 Ports External Signals - Motorola ColdFire MCF5281 User Manual

External Signal Description

26.2 External Signal Description
The MCF5282 ports control the functionality of several external pins. These pins are listed
in Table 26-1.
Primary
GPIO
Function (Pin
(Default
1
Function)
Name)
2
D[31:0] PA, PB, PC,
PD
1
OE PE[7]
1
TA PE[6]
1
TEA PE[5]
1
R/W PE[4]
1
SIZ1 PE[3]
1
SIZ0 PE[2]
1
TS PE[1]
1
TIP PE[0]
1
A[23:21] PF[7:5]
1
A[20:0] PF[4:0], PG,
PH
1
BS[3:0] PJ[7:4]
1
CS[3:0] PJ[3:0]
DDATA[3:0] PDD[7:4]
PST[3:0] PDD[7:4]
ETXCLK PEH[7]
ETXEN PEH[6]
ETXD[0] PEH[5]
ECOL PEH[4]
ERXCLK PEH[3]
ERXDV PEH[2]
ERXD[0] PEH[1]
ECRS PEH[0]
ETXD[3:1] PEL[7:5]
ETXER PEL[4]
ERXD[3:1] PEL[3:1]
26-4
Table 26-1. MCF5282 Ports External Signals
Alternate Alternate
Function 1 Function 2
— —
— —
— —
— —
— —
SYNCA —
SYNCB —
SYNCA —
SYNCB —
CS[6:4] —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
— —
MCF5282 User's Manual
Description
External data bus / Ports A, B, C, D
Output enable for external reads / Port E[7]
Transfer acknowledge for external data transfer / Port E[6]
Transfer error acknowledge for external data transfer / Port E[5]
Read/Write indication for external data transfer / Port E[4]
Size of the external data transfer / Port E[3] / Timer A sync
Size of the external data transfer / Port E[3:2] / Timer B sync
Transfer start indication for external data transfer / Port E[1] / Timer A
sync
Transfer in progress indication for external data transfer / Port E[0] /
Timer B sync
External address bus [23:21] / Port F[7:5] / Chip selects 6–4
External address bus [20:0] / Ports F[4:0], G, H
Byte strobes for external data transfer / Port J[7:4] / SDRAM column
address strobes
Chip selects 3 - 0 / Port J[3:0]
Debug data / Port DD[7:4]
Processor status / Port DD[3:0]
Ethernet transmit clock / PEH[7]
Ethernet transmit enable / PEH[6]
Ethernet transmit data [0] / PEH[5]
Ethernet collision / PEH[4]
Ethernet receive clock / PEH[3]
Ethernet receive data valid / PEH[2]
Ethernet receive data [0] / PEH[1]
Ethernet carrier receive sense / PEH[0]
Ethernet transmit data / Port EL[7:5]
Ethernet transmit error / Port EL[4]
Ethernet receive data [3:1] / Port EL[3:1]
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