MC68HC000RC12 Datasheet, PDF (153/189 Pages) Freescale Semiconductor, Inc – 8-/16-/32-Bit Microprocessors User’s Manual

Freescale Semiconductor, Inc.
CLK
FC2–FC0
A23–A0
AS
LDS / UDS
R/W
DTACK
DATA IN
BERR / BR
(NOTE 2)
HALT / RESET
ASYNCHRONOUS
INPUTS
(NOTE 1)
S0 S1 S2 S3 S4 S5 S6 S7
6A
8
6
7
15
14
13
11
11A
17
9
18
47
47
32
27
48
31
47
47
32
56
47
12
28
29A
29
30
NOTES:
1. Setup time for the asynchronous inputs IPL2–IPL0 and AVEC (#47) guarantees their recognition at the
next falling edge of the clock.
2. BR need fall at this time only to insure being recognized at the end of the bus cycle.
3. Timing measurements are referenced to and from a low voltage of 0.8 V and a high voltage of 2.0 V,
unless otherwise noted. The voltage swing through this range should start outside and pass through the
range such that the rise or fall is linear between 0.8 V and 2.0 V.
Figure 10-4. Read Cycle Timing Diagram
(A pplies To A ll Processors E xcept The MC68EC 000)
MOTOROLA
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
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10-13