Freescale Semiconductor MPC5553 - Modes of Operation

MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
12-4 Freescale Semiconductor
— 16 bits available in the MPC5553 324 BGA package
— No external bus in the MPC5553 208 BGA package
— Table 12-2 shows the data bus packages supported:
• Support for external master accesses to internal addresses
• Memory controller with support for various memory types:
— Synchronous burst SDR flash
— Asynchronous/legacy flash
• Burst support (wrapped only)
• Bus monitor
— User selectable
— Programmable timeout period (with 8 external bus clock resolution)
• Port size configuration per chip select (16 or 32 bits)
• Configurable wait states
• Four chip select (CS[0:3]) signals; but the MPC5553 has no CS signals in the 208 BGA package.
• Support for dynamic calibration with up to three calibration chip selects (CAL_CS[0] and
CAL_CS[2:3]) – in the VertiCal assembly of the MPC5553 only
• Write/byte enable (WE[0:3]/BE[0:3]) signals
— The MPC5554 has four WE/BE signals (WE[0:3]/BE[0:3])
— The MPC5553 has the following WE
/BE signals depending on the package:
– 416 BGA: four WE/BE signals (WE[0:3]/BE[0:3])
– 324 BGA: two WE/BE signals (WE[0:1]/BE[0:1])
– 208 BGA: no WE/BE signals
• Configurable bus speed modes (1/2 or 1/4 of system clock frequency)
• Module disable mode for power savings
• Optional automatic CLKOUT gating to save power and reduce EMI (not available on 208 BGA of
MPC5553)
• Compatible with MPC5xx external bus (See Section 12.4.1.18, “Compatible with MPC5xx
External Bus (with Some Limitations).”)
12.1.4 Modes of Operation
The mode of the EBI is determined by the MDIS and EXTM bits in the EBI_MCR. See Section 12.3.1.3,
“EBI Module Configuration Register (EBI_MCR)” for details. Configurable bus speed modes and debug
Table 12-2. Data Bus Size in MPC5554 and MPC5553
MPC5553 MPC5554
416 324 208 416
EBI Data
Bus Size
32 bit 16 bit
1
1
In both the MPC5554 and in the 416 BGA of the MPC5553, a 16-bit mode is
available. See Section 12.1.4.5, “16-Bit Data Bus Mode.”
16 bit None 32 bit 16 bit
1
Calibration
Data Bus Size
16 bit 16 bit None N.A.