Datasheet

Debug Support
MOTOROLA MCF5206e USER’S MANUAL 15-31
R[7]–Read/Write
This field is compared with the R/W signal of the processor’s local bus.
SZ[6:5]—Size
This field is compared to the size signals of the processor’s local bus. These signals indicate
the data size for the bus transfer.
00 = Longword
01 = Byte
10 = Word
11 = Reserved
TT[4:3]—Transfer Type
This field is compared with the transfer type signals of the processor’s local bus. These
signals indicate the transfer type for the bus transfer. These signals are always encoded as
if the ColdFire is in the ColdFire IACK mode.
00 = Normal Processor Access
01 = Reserved
10 = Emulator Mode Access
11 = Acknowledge/CPU Space Access
These bits also define the TT encoding for BDM memory commands. In this case, the 01
encoding generates an alternate master access (For backward compatibility).
TM[2:0]—Transfer Modifier
This field is compared with the transfer modifier signals of the processor’s local bus. These
signals provide supplemental information for each transfer type. These signals are always
encoded as if the processor is operating in the ColdFire IACK mode. The encoding for
normal processor transfers (TT = 0) is:
000 = Explicit Cache Line Push
001 = User Data Access
010 = User Code Access
011 = Reserved
100 = Reserved
101 = Supervisor Data Access
110 = Supervisor Code Access
111 = Reserved
The encoding for emulator mode transfers (TT = 10) is:
0xx = Reserved
100 = Reserved
101 = Emulator Mode Data Access
110 = Emulator Mode Code Access
111 = Reserved
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eescale S
emiconduct
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Freescale Semiconductor, Inc.
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