Epson Research and Development
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Vancouver Design Center
Hardware Functional Specification
S1D13704
Issue Date: 01/02/08
X26A-A-001-04
7.1.4 Motorola M68K #2 Interface Timing
Figure 7-4: M68K #2 Timing (MC68030)
Note
CLK may be turned off (held low) between accesses - see Section 13.5, “Turning Off
BCLK Between Accesses” on page 86
Table 7-4: M68K #2 Timing (MC68030)
Symbol
Parameter
Min
Max
Units
f
CLK
Bus Clock frequency
0
33
MHz
T
CLK
Bus Clock period
1/f
CLK
t1
A[15:0], CS#, SIZ0, SIZ1 valid before AS# falling edge
0
ns
t2
A[15:0], CS#, SIZ0, SIZ1 hold from AS#, DS# rising edge
0
ns
t3
AS# low to DSACK1# driven high
22
ns
t4
CLK to DSACK1# low
18
ns
t5
AS# high to DSACK1# high
26
ns
t6
AS# high to DSACK1# high impedance
T
CLK
t7
DS# falling edge to D[31:16] valid (write cycle)
T
CLK
/ 2
t8
AS#, DS# rising edge to D[31:16] invalid (write cycle)
0
ns
t9
D[31:16] valid to DSACK1# low (read cycle)
0
ns
t10
AS#, DS# rising edge to D[31:16] high impedance
20
ns
A[15:0]
AS#
DS#
VALID
t1
t8
t2
t7
R/W#
Hi-Z
CS#
SIZ0, SIZ1
CLK
t5
t3
t4
DSACK1#
Hi-Z
Hi-Z
t6
T
CLK
t9
VALID
Hi-Z
Hi-Z
D[31:16]
D[31:16]
VALID
Hi-Z
t10
(write)
(read)
*