NXP Semiconductors MPC5644A, Reference Manual, Page: 88 / 1735

Signal Description
MPC5644A Microcontroller Reference Manual, Rev. 6
88 Freescale Semiconductor
TCRCLKA eTPU2 Input clock for TCR time base
CAN_A_TX
CAN_B_TX
CAN_C_TX FlexCan_A -
FlexCAN_C FlexCAN transmit
CAN_A_RX
CAN_B_RX
CAN_C_RX FlexCAN_A -
FlexCAN_C FlexCAN receive
FR_A_RX
FR_B_RX FlexRay FlexRay receive (Channels A, B)
FR_A_TX_EN
FR_B_TX_EN FlexRay FlexRay transmit enable (Channels A, B)
FR_A_TX
FR_B_TX FlexRay Flexray transmit (Channels A, B)
JCOMP JTAG Enables the JTAG TAP controller.
TCK JTAG Clock input for the on-chip test logic.
TDI JTAG Serial test instruction and data input for the on-chip test logic.
TDO JTAG Serial test data output for the on-chip test logic.
TMS JTAG Controls test mode operations for the on-chip test logic.
EVTI Nexus EVTI is an input that is read on the negation of RESET to enable
or disable the Nexus Debug port. After reset, the EVTI pin is
used to initiate program synchronization messages or generate
a breakpoint.
EVTO Nexus Output that provides timing to a development tool for a single
watchpoint or breakpoint occurrence.
MCKO Nexus MCKO is a free running clock output to the development tools
which is used for timing of the MDO and MSEO signals.
MDO[0:11]
1
Nexus Trace message output to development tools. This pin also
indicates the status of the crystal oscillator clock following a
power-on reset, when MDO[0] is driven high until the crystal
oscillator clock achieves stability and is then negated.
MSEO[0:1]
1
Nexus Output pin—Indicates the start or end of the variable length
message on the MDO pins
RDY Nexus Nexus Ready Output (RDY) is an output that indicates to the
development tools the data is ready to be read from or written to
the Nexus read/write access registers.
Table 3-3. Signal details (continued)
Signal Module or Function Description