External Bus Interface (EBI)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
12-2
Freescale Semiconductor
12.1.1
Block Diagram
is a block diagram of the EBI. The signals shown are external pins to the MCU.
NOTE
Refer to in the Signals chapter, as not all signals are implemented in all
device packages. The last two columns in for a list of available signals on
the 324 package and the VertiCal assembly. The VertiCal assembly has ball
connections for all the
available
signals on the device.
The 324 package has a limited number of balls which affects the following EBI and calibration signals:
Table 12-1. MPC5565 324 Package Limitations
Features
MPC5565 Design
324 Package
Maximum 24-bit EBI address bus
ADDR[8:31]_GPIO[4:27]; ADDR[8:11] are muxed
as alternate signals with the chip select signals
CS[0:3]_ADDR[8:11]_GPIO[0:3]. ADDR[8:11] is
also muxed with GPIO[4:7], providing four chip
selects
and
24-bit address bits.
ADDR[8:11]_GPIO[4:7] no balls available.
Use CS[0:3]_ADDR[8:11]_GPIO[0:3] to
choose between using chip select signals
or
maximizing the number of output address
signals ADDR[8:31]_GPIO[0:3, 8:31] for a
24-bit EBI address bus.
Maximum 32-bits wide EBI data bus
DATA[0:31]_GPIO[28:59]
16 balls available for a 16-bit wide
DATA[0:15]_GPIO[28:43]. There are no balls
available for DATA[16:31]_GPIO[44:59].
Four EBI write enable/byte enable
WE/BE[0:3]
Two balls available (WE/BE[0:1])
EBI transfer error acknowledge
TEA_GPIO[71]
No ball available
EBI bus busy
BB signal not available
BB_GPIO[72] no ball available
EBI bus grant
BG signal not available
BG_GPIO[73] no ball available
Calibration bus
Calibration bus is separate from the EBI but uses
the EBI controller. Refer to for the calibration bus
signals.
No balls available. These signals are only
available in the VertiCal assembly.
Содержание MPC5565
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