Freescale Semiconductor MPC5553 - Etpu Signals

MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
2-52 Freescale Semiconductor
2.3.9.20 Voltage Reference Low
V
RL
V
RL
is the voltage reference low input pin for the eQADC.
2.3.9.21 Reference Bypass Capacitor
REFBYPC
REFBYPC is a bypass capacitor input for the eQADC. The REFBYPC pin is used to connect an external
bias capacitor between the REFBYPC pin and V
RL
. The value of this capacitor should be 100 nF.
2.3.10 eTPU Signals
The MPC5553 and MPC5554 support eTPU A signals. Only the MPC5554 supports eTPU B signals.
2.3.10.1 eTPU A TCR Clock / External Interrupt Request / GPIO
TCRCLKA_IRQ
[7]_GPIO[113]
TCRCLKA_IRQ[7]_GPIO[113] is the TCR A clock input for the eTPU module. The alternate function is
an external interrupt request input for the SIU module. This pin can also be used as a GPIO signal.
2.3.10.2 eTPU A Channel / eTPU A Channel (Output Only) / GPIO
ETPUA[0:11]_ETPUA[12:23]_GPIO[114:125]
ETPUA[0:11]_ETPUA[12:23]_GPIO[114:125] are input/output channel pins for the eTPU A module.
The primary functions are for the ETPU A module [0:11] and the alternate functions are for ETPU A
module [12:23]. The eTPU A alternate function is for output channels only; when configured as
ETPUA[12:23], the pins function as output only. These pins can be used as GPIO signals.
2.3.10.3 eTPU A Channel / DSPI B Chip Select / GPIO
ETPUA[12]_PCSB[1]_GPIO[126]
ETPUA[12]_PCSB[1]_GPIO[126] is an input/output channel pin for the eTPU A module muxed with the
DSPI B signal. The primary function is ETPUA[12] for the ETPU A module, and the alternate function is
PCSB[1] used for as a peripheral select for the DSPI B module. This pin can be used as a GPIO signal.
2.3.10.4 eTPU A Channel / DSPI B Chip Select / GPIO
ETPUA[13:15]_PCSB[3:5]_GPIO[127:129]
ETPUA[13:15]_PCSB[3:5]_GPIO[126:129] are input/output channel pins for the eTPU A module muxed
with DSPI B and D pins. The primary functions are for the ETPU A module and the alternate functions
are for DSPI B. These pins can also be used as GPIO signals.
2.3.10.5 eTPU A Channel / DSPI D Chip Select / GPIO
ETPUA[16:19]_PCSD[1:4]_GPIO[130:133]
ETPUA[16:19]_PCSD[1:4]_GPIO[130:133] are input/output channel pins for the eTPU A module muxed
with DSPI B and D pins. The primary function is ETPUA[16:19] for the ETPU A module, and the alternate