Datasheet

Bus Operation
MOTOROLA MCF5206e USER’S MANUAL 6-27
Figure 6-14. Burst-Inhibited Byte-, Word-, and Longword-Write Transfer Flowchart
MCF5206e SYSTEM
1. DRIVE ADDRESS ON A[27:0]
2. DRIVE R/W
TO WRITE (R/W = 0)
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. NEGATE TS
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
3. DRIVE DATA ON APPROPRIATE BYTE LANES BASED ON SIZ[1:0],
A[1:0] AND PORT SIZE
1. RECOGNIZE THE 1ST TRANSFER IS DONE
2. INCREMENT APPROPRIATE ADDRESS BITS BASED ON SIZ[1:0], A[3:0]
AND PORT SIZE
3. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
4. ASSERT TS
FOR ONE CLK CYCLE
1. RECOGNIZE THE 4TH TRANSFER IS DONE
2. THREE-STATE D[31:0]
1. DECODE ADDRESS AND SELECT THE
APPROPRIATE SLAVE DEVICE.*
2. CAPTURE DATA FROM THE APPROPRIATE
BYTE LANES BASED ON SIZ[1:0], A[1:0] AND
PORT SIZE
3. ASSERT TA
FOR ONE CLK CYCLE
*TO INSERT WAIT STATES, TA IS DRIVEN NEGATED.
1. DECODE ADDRESS AND SELECT THE APPROPRIATE
SLAVE DEVICE.*
2. CAPTURE DATA FROM THE APPROPRIATE BYTE LANES
BASED ON SIZ[1:0], A[1:0] AND PORT SIZE
3. ASSERT TA
FOR ONE CLK CYCLE
1. NEGATE TS
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
3. DRIVE DATA ON APPROPRIATE BYTE LANES BASED ON
SIZ[1:0], A[1:0] AND PORT SIZE
1. RECOGNIZE THE 3RD TRANSFER IS DONE
2. INCREMENT APPROPRIATE ADDRESS BITS BASED ON SIZ[1:0], A[3:0] AND PORT SIZE
3. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
4. ASSERT TS
FOR ONE CLK CYCLE
1. NEGATE TS
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
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. CAPTURE DATA FROM THE APPROPRIATE BYTE LANES
BASED ON SIZ[1:0], A[1:0] AND PORT SIZE
3. ASSERT TA
FOR ONE CLK CYCLE
1. RECOGNIZE THE 2ND TRANSFER IS DONE
2. INCREMENT APPROPRIATE ADDRESS BITS BASED ON
SIZ[1:0], A[3:0] AND PORT SIZE
3. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
4. ASSERT TS
FOR ONE CLK CYCLE
1. DECODE ADDRESS AND SELECT THE APPROPRIATE
SLAVE DEVICE.*
2. CAPTURE DATA FROM THE APPROPRIATE BYTE
LANES BASED ON SIZ[1:0], A[1:0] AND PORT SIZE
3. ASSERT TA
FOR ONE CLK CYCLE
1. NEGATE TS
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
3. DRIVE DATA ON APPROPRIATE BYTE LANES BASED ON
SIZ[1:0], A[1:0] AND PORT SIZE
Fr
eescale S
emiconduct
or
, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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