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13.4.2.1 SINGLE BEAT READ FLOW. The basic read cycle begins with a bus arbitration,
followed by the address transfer and the data transfer. The handshakes are illustrated in the
following diagrams as applicable to the fixed transaction protocol.
RECEIVES BUS GRANT (BG) FROM ARBITER
ASSERTS BUS BUSY (BB) IF NO OTHER MASTER IS DRIVING
DRIVES ADDRESS AND ATTRIBUTES
Figure 13-3. Basic Flow Diagram of a Single Beat Read Cycle
MOTOROLA
MASTER
REQUEST BUS (BR)
ASSERT TRANSFER START (TS)
ASSERTS TRANSFER ACKNOWLEDGE (TA)
RECEIVES DATA
MPC823e REFERENCE MANUAL
External Bus Interface
SLAVE
RECEIVES ADDRESS
RETURNS DATA
13-9
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