NXP Semiconductors MPC5566 - Signal Function and Direction by Mode

External Bus Interface (EBI)
MPC5566 Microcontroller Reference Manual, Rev. 2
12-12 Freescale Semiconductor
12.2.2 Signal Function and Direction by Mode
The EBI operating mode is configured using two fields in the EBI Master Control register (EBI_MCR):
EXTM and MDIS. Their settings determine which EBI signals are valid and the I/O direction. When the
a signal is configured for non-EBI function in the EBI_MCR, the EBI always negates the signal if the EBI
controls the corresponding pad (determined by SIU configuration). Table 12-5 lists the function and
direction of the external signals in each of the EBI modes of operation. The clock signals are not included
because they are output only (from the FMPLL module) and are not affected by EBI modes. See
Section 12.3.1.3, “EBI Module Configuration Register (EBI_MCR)” for details on the EXTM and MDIS
bits.
Table 12-5. Signal Function According to EBI Mode Settings
Signal Function
EBI Modes
Module Disable Mode
EXTM = n, MDIS = 1
Single Master Mode
I/O Direction
EXTM = 0, MDIS = 0
External Master Mode
I/O Direction
EXTM = 1, MDIS = 0
ADDR[6:11]
1
non-EBI function Address bus (output) Address bus (I/O)
2
ADDR[12:30] non-EBI function Address bus (output) Address bus (I/O)
2
BDIP non-EBI function Burst data in progress (output)
3
CS[0:3]
1
non-EBI function Chip selects (output)
3
DATA[0:31]
4
non-EBI function Data bus (I/O)
OE
non-EBI function Output enable (output)
RD_WR
non-EBI function Read/write (output) Read/write (I/O)
TA
non-EBI function Transfer acknowledge (I/O)
TEA
non-EBI function Transfer Error Acknowledge (I/O)
TS
non-EBI function Transfer start (output) Transfer start (I/O)
WE
/BE[0:3]
4
non-EBI function Write/byte enables (output)
3
CAL_CS[0:3]
5
non-EBI function Chip selects (output) for the 416 package
CAL_ADDR[12:30]
6,5
non-EBI function Calibrate the address bus (output)
CAL_DATA[0:15]
6,5
non-EBI function Calibrate the data bus (I/O)
CAL_OE
6,5
non-EBI function Calibrate the bus to enable output
CAL_TS
6,5
non-EBI function Calibrate the transfer start (output)
CAL_WE
/BE[0:1]
5
non-EBI function Calibrate the write/byte enables (output)
3
BB non-EBI function Non-EBI function Bus Busy (I/O)
BG
non-EBI function Non-EBI function Bus Grant (I/O)
BR
non-EBI function Non-EBI function Bus Request (I/O)
TSIZ[0:1] non-EBI function Transfer Size (Output) Transfer Size (I/O)