Line Read Burst (2-1-1-1), Internal Termination; Line Read Burst (3-2-2-2), External Termination - Motorola ColdFire MCF5281 User Manual

Data Transfer Operation
Figure 13-13 shows timing when internal termination is used.
CLKOUT
A[31:0]
A[31:0], SIZ[1:0]
R/W
TIP
TS
CSn, BSn, OE
D[31:0]
TA
Figure 13-13. Line Read Burst (2-1-1-1), Internal Termination
Figure 13-14 shows a line access read with one wait state programmed in CSCRn to give
the peripheral or memory more time to return read data. This figure follows the same
execution as a zero-wait state read burst with the exception of an added wait state.
.
S0 S1 S2 S3
CLKOUT
A[31:0], SIZ[1:0]
R/W
TIP
TS
CSn, BSn, OE
D[31:0]
TA
Figure 13-14. Line Read Burst (3-2-2-2), External Termination
Figure 13-15 shows a burst-inhibited line read access with fast termination. The external
device executes a basic read cycle while determining that a line is being transferred. The
external device uses fast termination for subsequent transfers.
13-12
S0 S1 S2 S3 S4
Read
WS
S4 S5
Read
MCF5282 User's Manual
S5 S6 S7 S8
Read
Read
WS WS S8
S7
S6
Read Read
S9 S10 S11 S12 S13
Read
WS S10 S12
S9
S11 S13
Read
MOTOROLA