External Bus Interface
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
9-31
illustrates the device connections on the data bus.
Figure 9-23. Interface To Different Port Size Devices
lists the bytes required on the data bus for read cycles.
Note:
“—” denotes a byte not required during that read cycle.
Table 9-2. Data Bus Requirements For Read Cycles
Transfer
Size
TSIZE
[0:1]
Address
32-bit Port Size
16-bit Port Size
8-bit
Port
Size
ADDR
[30:31]
DATA
[0:7]
DATA
[8:15]
DATA
[16:23]
DATA
[24:31]
DATA
[0:7]
DATA
[8:15]
DATA
[0:7]
Byte
01
00
OP0
—
—
—
OP0
—
OP0
01
01
—
OP1
—
—
—
OP1
OP1
01
10
—
—
OP2
—
OP2
—
OP2
01
11
—
—
—
OP3
—
OP3
OP3
Half-word
10
00
OP0
OP1
—
—
OP0
OP1
OP0
10
10
—
—
OP2
OP3
OP2
OP3
OP2
Word
00
00
OP0
OP1
OP2
OP3
OP0
OP1
OP0
0
31
32-bit Port Size
OP0
OP1
OP2
OP3
OP0
OP1
OP2
OP3
OP0
OP1
OP2
OP3
OP0
OP1
OP2
OP3
16-bit Port Size
8-bit Port Size
DATA[0:7]
DATA[8:15]
DATA[16:23]
DATA[24:31]
Interface
Output
Register
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...