NXP Semiconductors MPC5644A Reference Manual page 87

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