External Bus Interface (EBI)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
12-68
Freescale Semiconductor
12.6
Document Revision History
Table 22. Changes Between MPC5565RM Revisions 0.1 and 1
Added: During a calibration bus access, the non-calibration bus signals (other than DATA) are held in a negated state, with
the exception of RD_WR and ADDR, which reflect the same values shown on the calibration version of those signals. This is
harmless because TS and CS are held negated on the non-calibration bus during calibration accesses, so no transfer takes
place on the non-calibration bus. DATA is not driven by the EBI during calibration accesses.
During a non-calibration bus access, the calibration bus signals (other than CAL_DATA) are held in a negated state. CAL_DATA
is not driven during non-calibration accesses.
Added corrected “Read After Write to the Same CS Bank” figure, and added the note: “In some cases, CS remains asserted
during this dead cycle, such as the cases of back-to-back writes or read-after-write to the same chip-select. See Figure 12-20
and Figure 12-21
.
In Table 12.4.2.3 changed:
• From: “To facilitate asynchronous write support, the EBI keeps driving valid write data on the data bus until 1 clock after the
rising edge where RD_WR and WE are negated (for chip select accesses only).”
• To: “To facilitate asynchronous write support, the EBI keeps driving valid write data on the data bus until 1 clock after the
rising edge where RD_WR (and WE for chip select accesses) are negated.
Figure 12-2 added the Calibration signals.
Section 12.4.1.9, “Port Size Configuration per Calibration Chip Select (16 Bits): Conditionalized for 496 assembly only.
Section 12.2.1.13, “Transfer Size 0 through 1 (TSIZ[0:1]): Added: Because the MPC5565 does not have transfer size pins
(TSIZ[0:1]), the SIZEN and SIZE fields of the EBI_MCR must be used for MCU-to-MCU transfers to indicate transfer size.
Section 12.3.1.3, “EBI Module Configuration Register (EBI_MCR) Added: Because the MPC5565 does not have transfer size
pins (TSIZ[0:1]), the SIZEN and SIZE fields of the EBI_MCR must be used for MCU-to-MCU transfers to indicate transfer size.
Содержание MPC5565
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Страница 973: ...Preface MPC5565 Microcontroller Reference Manual Rev 1 0 21 36 Freescale Semiconductor...
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