NXP Semiconductors MPC5644A, Reference Manual, Page: 87 / 1735

Signal Description
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor 87
RD_WR EBI RD_WR indicates whether the current transaction is a read
access or a write access.
TA EBI TA is asserted to indicate that the slave has received the data
(and completed the access) for a write cycle, or returned data for
a read cycle. If the transaction is a burst read, TA is asserted for
each one of the transaction beats. For write transactions, TA is
only asserted once at access completion, even if more than one
write data beat is transferred.
TS EBI The Transfer Start signal (TS) is asserted by the MPC5644A to
indicate the start of a transfer.
WE[2:3] EBI Write enables are used to enable program operations to a
particular memory. WE[2:3] are only asserted for write accesses
WE[0:3]/BE[0:3] EBI Write enables are used to enable program operations to a
particular memory. These signals can also be used as byte
enables for read and write operation by setting the WEBS bit in
the appropriate EBI Base Register (EBI_BR
n ). WE[0:3] are only
asserted for write accesses. BE[0:3] are asserted for both read
and write accesses
eMIOS[0:23] eMIOS eMIOS I/O channels
AN[0:39] eQADC Single-ended analog inputs for analog-to-digital converter
FCK eQADC eQADC free running clock for eQADC SSI.
MA[0:2] eQADC These three control bits are output to enable the selection for an
external Analog Mux for expansion channels.
REFBYPC eQADC Bypass capacitor input
SDI eQADC Serial data in
SDO eQADC Serial data out
SDS eQADC Serial data select
VRH eQADC Voltage reference high input
VRL eQADC Voltage reference low input
SCI_A_RX
SCI_B_RX
SCI_C_RX eSCI_A - eSCI_C eSCI receive
SCI_A_TX
SCI_B_TX
SCI_C_TX eSCI_A - eSCI_C eSCI transmit
ETPU_A[0:31] eTPU eTPU I/O channel
RCH0_[A:C]
RCH1_[A:C]
RCH2_[A:C]
RCH3_[A:C]
RCH4_[A:C]
RCH5_[A:C] eTPU2
Reaction Module eTPU2 reaction channels. Used to control external actuators,
e.g., solenoid control for direct injection systems and valve
control in automatic transmissions
Table 3-3. Signal details (continued)
Signal Module or Function Description