mcf5307cft90b Freescale Semiconductor, Inc, mcf5307cft90b Datasheet - Page 404

• Manufacturer Part Number: mcf5307cft90b
• Description: Mcf5307 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

Misaligned Operands
transfer.
Note that with external termination, address signals do not change. With internal
termination, Figure 18-20, A[1:0] increment for the same longword transfer.
18.5 Misaligned Operands
Because operands, unlike opcodes, can reside at any byte boundary, they are allowed to be
misaligned. A byte operand is properly aligned at any address, a word operand is
misaligned at an odd address, and a longword is misaligned at an address not a multiple of
four. Although the MCF5307 enforces no alignment restrictions for data operands
(including program counter (PC) relative data addressing), additional bus cycles are
required for misaligned operands.
TM[2:0], SIZ[1:0]
18-16
A[31:0], TT[1:0]
TM[2:0], SIZ[1:0]
BE/BWEx, OE
A[31:2], TT[1:0]
BE/BWEx, OE
AS, CSx
Figure 18-19. Longword Read from an 8-Bit Port, External Termination
BCLKO
Figure 18-20. Longword Read from an 8-Bit Port, Internal Termination
D[31:0]
AS, CSx
BCLKO
D[31:0]
R/W
TIP
A[1:0]
TS
TA
R/W
TIP
TS
TA
Freescale Semiconductor, Inc.
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For More Information On This Product,
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Go to: www.freescale.com
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MCF5307 User’s Manual
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