Datasheet

Bus Operation
6-42 MCF5206e USER’S MANUAL MOTOROLA
Figure 6-24. Burst-Inhibited Word-, Longword-, and Line-Read Transfer with
Asynchronous Termination Flowchart
1. REGISTER DATA
2. RECOGNIZE THE 1ST TRANSFER IS DONE
1. NEGATE TS
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
1. INCREMENT THE APPROPRIATE ADDRESS BITS BASED ON
A[3:0], SIZ[1:0] AND PORT SIZE
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
3. ASSERT TS
FOR ONE CLK CYCLE
MCF5206e SYSTEM
1. DRIVE ADDRESS ON A[27:0]
2. DRIVE R/W
TO READ (R/W = 1)
3. DRIVE SIZ[1:0] TO INDICATE BYTE, WORD OR LONGWORD
4. DRIVE TT[1:0] AND ATM TO INDICATE APPROPRIATE ACCESS
TYPE
5. ASSERT TS
FOR ONE CLK CYCLE
1. REGISTER DATA
2. RECOGNIZE THE 2ND TRANSFER IS DONE
1. INCREMENT THE APPROPRIATE ADDRESS BITS BASED ON
A[3:0], SIZ[1:0] AND PORT SIZE
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
3. ASSERT TS
FOR ONE CLK CYCLE
1. REGISTER DATA
2. RECOGNIZE THE 3RD TRANSFER IS DONE
1. NEGATE TS
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
1. INCREMENT THE APPROPRIATE ADDRESS BITS BASED
ON A[3:0], SIZ[1:0] AND PORT SIZE
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
3. ASSERT TS
FOR ONE CLK CYCLE
1. REGISTER DATA
2. RECOGNIZE THE 4TH TRANSFER IS DONE
1. NEGATE TS
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
1. DECODE ADDRESS AND SELECT THE APPROPRIATE
SLAVE DEVICE.*
2. ASSERT ATA
3. DRIVE DATA ON APPROPRIATE BYTE LANES BASED ON
SIZ[1:0], A[1:0] AND PORT SIZE
*TO INSERT WAIT STATES, ATA IS DRIVEN NEGATED.
1. DECODE ADDRESS AND SELECT THE APPROPRIATE
SLAVE DEVICE.*
2. ASSERT ATA
3. DRIVE DATA ON APPROPRIATE BYTE LANES BASED ON
SIZ[1:0], A[1:0] AND PORT SIZE
1. DECODE ADDRESS AND SELECT THE APPROPRIATE
SLAVE DEVICE.*
2. ASSERT ATA
3. DRIVE DATA ON APPROPRIATE BYTE LANES BASED ON
SIZ[1:0], A[1:0] AND PORT SIZE
1. DECODE ADDRESS AND SELECT THE APPROPRIATE
SLAVE DEVICE.*
2. ASSERT ATA
3. DRIVE DATA ON APPROPRIATE BYTE LANES BASED ON
SIZ[1:0], A[1:0] AND PORT SIZE
1. NEGATE TS
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
Fr
eescale S
emiconduct
or
, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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