mcf5407 Freescale Semiconductor, Inc, mcf5407 Datasheet - Page 443

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

Figure 18-17 shows a line burst write with one wait-state insertion.
Figure 18-18 shows a burst-inhibited line write. The external device executes a basic write
cycle while determining that a line is being transferred. The external device uses fast
termination to end each subsequent transfer.
OE, BWE
18.4.7.4 Transfers Using Mixed Port Sizes
Figure 18-19 shows timing for a longword read from an 8-bit port using external
termination. Figure 18-20 shows the same transfer with internal termination. For both,
SIZ[1:0] change only at the start of a new transfer because this burst is implemented as one
TM[2:0], TT[1:0]
R/W, TIP
AS, CSx
Figure 18-17. Line Write Burst (3-2-2-2) with One Wait State, Internal Termination
SIZ[1:0]
TM[2:0]
D[31:0]
A[31:0]
TT[1:0]
CLKIN
OE, BWE
TS
TA
R/W, TIP
AS, CSx
SIZ[1:0]
D[31:0]
A[31:0]
CLKIN
TS
TA
Figure 18-18. Line Write Burst-Inhibited, Internal Termination
S0
S0 S1 S2 S3
S1
A[3:2] = 00
S2 S3 S4 S5 S0 S1 S4 S5 S0 S1 S4 S5 S0 S1 S4 S5
Basic
Line
Write
Write
Chapter 18. Bus Operation
WS
S4 S5
A[3:2] = 01
Fast
Write
Write
WS
S6
A[3:2] = 10
Longword
S7
Fast
Write
Write
WS
S8
Data Transfer Operation
A[3:2] = 11
S9
Fast
Write
Write
WS
S10
S11
18-15