Datasheet

Bus Operation
6-20 MCF5206e USER’S MANUAL MOTOROLA
Figure 6-10. Word-, Longword-, and Line-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 WORD, LONGWORD OR LINE
4. DRIVE TT[1:0] AND ATM TO INDICATE APPROPRIATE
ACCESS TYPE
5. ASSERT TS
FOR ONE CLK CYCLE
1. RECOGNIZE THE 4TH TRANSFER IS DONE
2. THREE-STATE D[31:0]
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 DATA ON APPROPRIATE BYTE LANES BASED ON
SIZ[1:0], A[1:0] AND PORT SIZE
*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. 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. 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. 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 3RD TRANSFER IS DONE
2. INCREMENT APPROPRIATE ADDRESS BITS BASED ON
SIZ[1:0], A[3:0] AND PORT SIZE
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
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 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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