Datasheet

Bus Operation
6-24 MCF5206e USER’S MANUAL MOTOROLA
Figure 6-12. Burst-Inhibited Word-, Longword-, and Line-Read Transfer Flowchart
1. INCREMENT APPROPRIATE ADDRESS BITS BASED ON
A[3:0] AND PORT SIZE
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
3. ASSERT TS
FOR ONE CLK CYCLE
1. NEGATE TS
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
1. INCREMENT APPROPRIATE ADDRESS BITS BASED ON
A[3:0] 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. NEGATE TS
2. ASSERT ATM TO INDICATE APPROPRIATE ACCESS TYPE
1. REGISTER DATA
2. RECOGNIZE THE 3RD TRANSFER IS DONE
1. NEGATE TS
2. ASSERT ATM TO INDICATE APPROPRIATE ACCESS TYPE
1. NEGATE TS
2. ASSERT ATM TO INDICATE APPROPRIATE ACCESS TYPE
1. REGISTER DATA
2. RECOGNIZE THE 4TH TRANSFER IS DONE
1. INCREMENT APPROPRIATE ADDRESS BITS BASED ON
A[3:0] AND PORT SIZE
2. DRIVE ATM TO INDICATE APPROPRIATE ACCESS TYPE
3. ASSERT TS
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
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
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. REGISTER DATA
2. RECOGNIZE THE 1ST TRANSFER IS DONE
Fr
eescale S
emiconduct
or
, I
Freescale Semiconductor, Inc.
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