mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 436

• Manufacturer Part Number: mcf5407
• Description: Mcf5407 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

SIZ[1:0], A[31:0]
Data Transfer Operation
Note the following characteristics of a basic read:
States are described in Table 18-4.
18.4.4 Write Cycle
During a write cycle, the MCF5407 sends data to memory or to a peripheral device. The
write cycle flowchart is shown in Figure 18-7.
TT[1:0], TM[2:0]
18-8
• In S3, data is made available by the external device on the falling edge of CLKIN
• In S4, the external device can stop driving data after the rising edge of CLKIN.
• For a read cycle, the external device stops driving data between S4 and S5.
BEx, OE
AS, CSx
D[31:0]
and is sampled on the rising edge of CLKIN with TA asserted.
However, data could be driven up to S5.
CLKIN
R/W
TIP
TS
TA
termination. TA assertion should look the same in either case.
Figure 18-6. Basic Read Bus Cycle
S0
MCF5407 User’s Manual
S1
S2
S3
Read
S4
S5