2 features, 2 external pin description, Features -3 – Freescale Semiconductor MCF5480 User Manual
Page 375: External pin description -3

External Pin Description
MCF548x Reference Manual, Rev. 3
Freescale Semiconductor
15-3
•
External DMA request and acknowledge (DMA)
•
PCI bus access (PCIGNT, PCIREQ)
•
Ethernet data and control (FEC0H, FEC0L, FEC1H, FEC1L, FECI2C)
•
I
2
C serial control (FECI2C)
•
DMA serial peripheral interface (DSPI)
•
Programmable serial control (PSC1PSC0 and PSC3PSC2)
15.1.2
Features
The MCF548x GPIO module includes these distinctive features:
•
Control of primary function use of the supported GPIO ports indicated in
•
General purpose I/O support for all ports:
— Registers for storing output pin data
— Registers for controlling pin data direction
— Registers for reading current pin state
— Registers for setting and clearing output pin data registers
15.2
External Pin Description
The MCF548x GPIO module controls the functionality of several external pins. These pins are listed in
.
Table 15-1. MCF548x GPIO Module External Pins
Primary
Function
(Pin Name)
1
GPIO
Alternate
Function 1
Alternate
Function 2
Description
Flexbus Control
BWE[3:2]
PFBCTL[7:6]
BE / BWE[3:2]
TSIZ[1:0]
Byte write strobes for external data transfer / Port
FBCTL[7:4] / Byte enables for external data transfer /
FlexBus transfer size
BWE[1:0]
PFBCTL[5:4]
BE / BWE[1:0]
FBADDR[1:0]
Byte write strobes for external data transfer / Port
FBCTL[7:4] / Byte enables for external data transfer /
FlexBus address[1:0]
OE
PFBCTL3
—
—
Output enable for external reads / Port FBCTL3
R/W
PFBCTL2
TBST
—
Read/write indication for external data transfer / Port
FBCTL2 / FlexBus transfer burst
TA
PFBCTL1
—
—
Transfer acknowledge for external data transfer / Port
FBCTL1
ALE
PFBCTL0
TBST
—
Address latch enable indication for external data transfer
/ Port FBCTL0 / FlexBus transfer burst
Flexbus Chip Selects
FBCS[5:1]
PFBCS[5:1]
—
—
Flexbus chip selects 5 – 1 / Port FBCS[5:4]
DMA Controller
DACK1
PDMA3
TOUT1
—
DMA acknowledge 1 / Port DMA3 / GP timer output 1