mc68307ad Freescale Semiconductor, Inc, mc68307ad Datasheet - Page 25

• Manufacturer Part Number: mc68307ad
• Description: Integrated Multiple-bus Processor
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
NOTES:
ASYNCHRONOUS
3. BR need fall at this time only to ensure being recognized at the end of the bus cycle.
2. Because of loading variations, R/W may be valid after AS even though both are initiated by the rising edge
1. Setup time (#47) for asynchronous inputs (HALT, RESET, BR, BGACK, DTACK) guarantees
HALT / RESET
of S2 (specification #20A).
their recognition at the next falling edge of the clock.
LDS / UDS
(NOTE 1)
(NOTE 3)
INPUTS
(NOTE 2)
D15–D0
(NOTE 2)
DTACK
A23–A1
CSx, AS
R/W
CLK
BR
13
S0
17
Figure 9. Write Cycle Timing Diagram
MC68307 TECHNICAL INFORMATION
15
7
18
S1
8
11A
32
47
15A
55
23
S2
21
9
6
26
11
S3
20
20A
48
56
22
S4
47
14
9
S5
32
47
47
47
14A
S6
S7
12
28
53
25
25