External Bus Interface (EBI)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
12-12
Freescale Semiconductor
Table 12-5. Signal Function (
f
) According to EBI Mode Settings
Signal Name
Modes
Module Disable
f
EXTM =
n
, MDIS = 1
Single Master
f
I/O Direction
EXTM = 0, MDIS = 0
External Master
f
I/O Direction
EXTM = 1, MDIS = 0
ADDR[8:11]
1
1
These signals are muxed with the chip select (CS) signals on this device. Use the pad configuration
registers (PCR) in the system integration module (SIU) to configure the balls to use the address
signals
or
chip select signals–not both.
non-EBI function
Address bus (output)
Address bus (I/O)
2
2
All I/O signals are three-stated by the EBI when not actively involved in a transfer.
ADDR[12:30]
non-EBI function
Address bus (output)
Address bus (I/O)
BDIP
non-EBI function
Burst data in progress (output)
3
3
Although external master accesses can drive these pins, the EBI three-states the pins and does not
sample them for input.
CS[0:3]
non-EBI function
Chip selects (output)
DATA[0:31]
4
4
This device is designed to support a 32-bit EBI data bus (DATA[0:31]) and four write/byte enable
signals (WE/BE[0:3]) on the VertiCal assembly. The 324 package provides a 16-bit EBI data bus
(DATA[0:16]) and two write/byte enable signals (WE/BE[0:1]) only.
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
5
5
Although the device design supports the TEA signal, it is not available on the 324 package. The TEA
signal is available for this device on the VertiCal assembly only.
non-EBI function
Transfer Error Acknowledge (I/O)
TS
non-EBI function
Transfer start (output)
Transfer start (I/O)
WE/BE[0:1]
non-EBI function
Write/byte enables (output)
WE/BE[2:3]
non-EBI function
Write/byte enables (output)
CAL_CS[0, 2:3]
6
6
The calibration signals for this device are available on the VertiCal assembly only.
non-EBI function
Chip selects (output)
non-EBI function
Calibrate the address bus (output)
CAL_DATA[0:15]
non-EBI function
Calibrate the data bus (I/O)
non-EBI function
Calibrate the bus to enable output
non-EBI function
Calibrate the transfer start (output)
CAL_WE/BE[0:1]
non-EBI function
Write/byte enables (output)
Содержание MPC5565
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Страница 1153: ...Calibration MPC5565 Microcontroller Reference Manual Rev 1 0 B 8 Freescale Semiconductor...