NXP Semiconductors MPC5644A, Reference Manual, Page: 322 / 1735

External Bus Interface (EBI)
MPC5644A Microcontroller Reference Manual, Rev. 6
322 Freescale Semiconductor
Figure 14-31. Internal Operand Representation
Figure 14-32 shows the device connections on the DATA[0:31] bus.
Figure 14-32. Interface to Different Port Size Devices
Table 14-16 lists the bytes required on the data bus for read cycles. The bytes indicated as ‘—’ are not
required during that read cycle.
Table 14-17 lists the patterns of the data transfer for write cycles when accesses are initiated by the MCU.
The bytes indicated as ‘—’ are not driven during that write cycle.
OP0 OP1 OP2
0 31
32-BIT
16-BIT
BYTE
OP0
OP1
OP2
OP3
OP0 OP1
OP2 OP3
OP3
0 31
32-bit port size OP0 OP1 OP2 OP3
OP0 OP1
OP2 OP3
OP0 OP1 OP2 OP3
16-bit port size
DATA[0:7] DATA[8:15] DATA[16:23]
DATA[24:31]
Interface
Output