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MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor
2-37
2.3.1.6
Reset Boot Configuration / External Interrupt Request / GPIO
BOOTCFG[0:1]_IRQ[2:3]_GPIO[211:212]
BOOTCFG[0:1]_IRQ[2:3]_GPIO[211:212] are sampled on the negation of the RSTOUT pin, if the
RSTCFG pin is asserted at that time. The values are used by the BAM program to determine the boot
configuration of the MPC5553/MPC5554. The alternate function is external interrupt request input.
BOOTCFG[0] does not function in the 208 package of the MPC5553.
2.3.1.7
Weak Pull Configuration / GPIO
WKPCFG_GPIO[213]
WKPCFG_GPIO[213] determines whether specified eTPU and eMIOS pins are connected to a weak
pullup or weak pulldown during and immediately after reset.
2.3.2
External Bus Interface (EBI) Signals
2.3.2.1
External Chip Selects / External Address / GPIO
CS[0:3]_ADDR[8:11]_GPIO[0:3]
CS[0:3]_ADDR[8:11]_GPIO[0:3] are the external bus interface (EBI) chip select output signals. These
balls can be individually configured as chip selects or GPIO. Because ADDR[8:11] is multiplexed to more
than one set of balls, only assign ADDR[8:11] to one set of balls for external address input. Read the
following functions that include ADDR[8:11] in this section.
NOTE
CS[1:3]_ADDR[9:11]_GPIO[1:3] are not pinned out in the 208 PBGA of
the MPC5553.
2.3.2.2
External Address / Calibration Address / GPIO
ADDR[8:11]_CAL_ADDR[27:30]_GPIO[4:7]
ADDR[8:11]_CAL_ADDR[27:30]_GPIO[4:7] are the EBI address and calibration signals. Because
ADDR[8:11] is multiplexed to more than one set of pins, ADDR[8:11] must be assigned to only one set of
pins for external address input. Refer to the previous and following functions. The alternate function is
used for the calibration bus addressing and is only available on the MPC5553. The calibration function is
not available on the MPC5554. These pins can be used as GPIO signals.
2.3.2.3
External Address / Calibration Address / GPIO
ADDR[12:31]_GPIO[8:27]
ADDR[12:31]_GPIO[8:27] has the EBI address signals as the primary signal. These pins can be used as
GPIO signals.
Содержание MPC5553
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