MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
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Freescale Semiconductor
with the external bus interface (EBI), the OE primary function is also used for the calibration output enable
function. The MPC5554 does not have a calibration bus. This pin can be used as a GPIO signal on the
MPC5553 or MPC5554.
2.3.3.6
External Transfer Start / GPIO
TS_GPIO[69]
TS_GPIO[69] has a primary signal function of TS that indicates the start of an external bus transfer. The
MPC5553 and MPC5554 use the TS primary function for external bus transfers. Because the MPC5553
calibration bus interface (CBI) shares the bus with the external bus interface (EBI), the TS primary
function is also used for the calibration transmit start function. The MPC5554 does not use the calibration
bus. This pin can be used as a GPIO signal on either the MPC5553 or MPC5554.
2.3.3.7
External Transfer Acknowledge / GPIO
TA_GPIO[70]
TA_GPIO[70] has a primary signal function of external transfer acknowledge. This signal is asserted by
the EBI owner to acknowledge that the slave has completed the current transfer.
2.3.3.8
External Transfer Error Acknowledge / Calibration Chip Select / GPIO
TEA_CAL_CS[0]_GPIO[71]
TEA_CAL_CS[0]_GPIO[71] has a primary signal function of external transfer error acknowledge. This
signal indicates that an error has occurred in the current external bus transfer. The alternate signal function
CAL_CS[0] is only available on the MPC5553 and provides a calibration chip select function. The
calibration function CAL_CS[0] is not available on the MPC5554. This pin can be used as a GPIO signal
on either the MPC5553 or MPC5554.
2.3.3.9
External Bus Request / Calibration Address / Ethernet Manage Data
Clock / Calibration
Chip Select
/ GPIO
BR_CAL_ADDR[10]_FEC_MDC_CAL_CS[2]_GPIO[72]
BR_CAL_ADDR[10]_FEC_MDC_CAL_CS[2]_GPIO[72] has a primary signal function of an external
bus request that is only available on the MPC5554. The external bus request function BR used by an
external bus master to request ownership of the EBI from the arbiter. The external bus request function is
not available on the MPC5553. The MPC5553 has a primary signal function of CAL_ADDR[10]. The
alternate signal function FEC_MDC provides a fast Ethernet data clock management to manage the output
signals. The second alternate signal function CAL_CS[2] provides a calibration chip select function. The
FEC function FEC_MDC and the calibration function CAL_CS[2] are not available on the MPC5554.
This pin can be used as a GPIO signal on either the MPC5553 or MPC5554.
2.3.3.10
External Bus Grant / Calibration Address / Ethernet Manage Data I/O /
Calibration
Chip Select
/ GPIO
BG_CAL_ADDR[11]_FEC_MDIO_CAL_CS[3]_GPIO[73]
BG_CAL_ADDR[11]_FEC_MDIO_CAL_CS[3]_GPIO[73] has a primary signal function of external bus
grant that is used by the external bus arbiter to give ownership of the EBI to the requesting master. The
external bus grant function is not available on the MPC5553.
Содержание MPC5553
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