Motorola MPC823e - Page 328

External Bus Interface
MOTOROLA MPC823e REFERENCE MANUAL 13-21
EXTERNAL BUS
13
INTERFACE
Figure 13-14. Basic Flow Diagram of a Burst Write Cycle
MASTER SLAVE
REQUEST BR
RECEIVE BG FROM ARBITER
ASSERT BB
IF NO OTHER MASTER IS DRIVING
ASSERT TS
ASSERT ADDRESS AND ATTRIBUTES
RECEIVE ADDRESS
ASSERT TA
DRIVE DATA
ASSERT BURST
DRIVE DATA
BDIP ASSERTED
YES
ASSERT TA
ASSERT TA
STOP DRIVING DATA
NEGATE BDIP
NO
DO NOT SAMPLE
NEXT DATA
ASSERT BDIP
DRIVE DATA
BDIP ASSERTED
YES
ASSERT TA
NO
DO NOT SAMPLE
NEXT DATA
DRIVE DATA
BDIP ASSERTED
YES
NO
DO NOT SAMPLE
NEXT DATA
NEGATE BB
NEGATE BURST
STOP DRIVING ADDRESS AND ATTRIBUTES
RECEIVE DATA
RECEIVE DATA
RECEIVE DATA
RECEIVE DATA