Datasheet

Bus Operation
MOTOROLA MCF5206e USER’S MANUAL 6-17
Figure 6-8. Bursting Word-, Longword-, and Line-Read Transfer Flowchart
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 WORD, LONGWORD OR
LINE
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
1. REGISTER DATA
2. RECOGNIZE THE TRANSFER IS DONE
1. REGISTER DATA
2. INCREMENT APPROPRIATE ADDRESS BITS BASED
ON SIZ[1:0], A[3:0] AND PORT SIZE
1. REGISTER DATA
2. INCREMENT APPROPRIATE ADDRESS BITS BASED
ON SIZ[1:0], A[3:0] AND PORT SIZE
1. REGISTER DATA
2. INCREMENT APPROPRIATE ADDRESS BITS BASED
ON SIZ[1:0], A[3:0] AND PORT SIZE
1. DECODE ADDRESS AND SELECT THE APPROPRIATE
SLAVE DEVICE*
2. DRIVE DATA ON 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. DRIVE DATA ON 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. DRIVE DATA ON 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. DRIVE DATA ON APPROPRIATE BYTE LANES BASED ON
SIZ[1:0], A[1:0] AND PORT SIZE
3. ASSERT TA
FOR ONE CLK CYCLE
Fr
eescale S
emiconduct
or
, I
Freescale Semiconductor, Inc.
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Go to: www.freescale.com
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