MOTOROLA
MC68341 USER’S MANUAL
12-9
12.7 AC TIMING SPECIFICATIONS - PRELIMINARY (Continued)
3.3 V or
5.0 V
16.78 MHz
25.16 MHz
Num.
Characteristic
Symbol
Min
Max
Min
Max
Unit
24
Data-Out Valid to Negating Edge of AS, CS ,
(Fast Termination Write)
tDVASN
15
—
10
—
ns
25
DS, CS , UDS, LDS Negated to Data-Out Invalid
(Data-Out Hold)
tSNDOI
15
—
10
—
ns
26
Data-Out Valid to DS Asserted (Write)
tDVSA
15
—
10
—
ns
26A
Data-Out Valid to UDS, LDS Asserted (Write)
tDVBSA
45
—
30
—
ns
27
Data-In Valid to CLKOUT Low (Data Setup)
tDICL
5—5—
ns
27A
Late BERR , HALT, BKPT Asserted to CLKOUT
Low (Setup Time, no 68K Bus)
tBELCL
20
—
10
—
ns
28
AS , DS AS68K, UDS, LDS Negated to
DSACK≈ , BERR , HALT Negated
tSNDN
0
80
0
50
ns
294
DS, UDS, LDS, CS0 Negated to Data-In Invalid
(Data-In Hold)
tSNDI
0
—
0
—
ns
29A4
DS, CS, UDS, LDS Negated to Data-In High
Impedance
tSHDI
—
60
—
40
ns
304
CLKOUT Low to Data-In Invalid (Fast
Termination Hold)
tCLDI
15
—
10
—
ns
30A4
CLKOUT Low to Data-In High Impendance
tCLDH
—90
—60
ns
315
DSACK≈ Asserted to Data-In Valid
tDADI
—50
—32
ns
31A
DSACK≈ Asserted to DSACK≈ Valid (Skew)
tDADV
—30
—20
ns
32
HALT and RESET Input Transition Time
tHRrf
—
200
—
140
ns
33
CLKOUT Low to BG Asserted
tCLBA
—30
—20
ns
34
CLKOUT Low to BG Negated
tCLBN
—30
—20
ns
356
BR Asserted to BG Asserted (RMC Not
Asserted)
tBRAGA
1
—
1
—
CLKOUT
37
BGACK Asserted to BG Negated
tGAGN
1
2.5
1
2.5
CLKOUT
39
BG Width Negated
tGH
2—2—
CLKOUT
39A
BG Width Asserted
tGA
1—1—
CLKOUT
46
R/ W Width Asserted (Write or Read)
tRWA
150
—
100
—
ns
46A
R/ W Width Asserted (Fast Termination Write or
Read)
tRWAS
90
—
60
—
ns
47A8
Asynchronous Input Setup Time
tAIST
8, 5
—
5
—
ns
47B
Asynchronous Input Hold Time
tAIHT
15
—
10
—
ns
485,7
DSACK≈ Asserted to BERR , HALT Asserted
tDABA
—30
—20
ns
53
Data-Out Hold from CLKOUT High
tDOCH
0—0—
ns
54
CLKOUT High to Data-Out High Impedance
tCHDH
—30
—20
ns
55
R/ W Asserted to Data Bus Impedance Change
tRADC
40
—
25
—
ns
56
RESET Pulse Width (Reset Instruction)
tHRPW
512
—
512
—
CLKOUT
56A
RESET Pulse Width (Input from External
Device)
tRPWI
590
—
590
—
CLKOUT
57
BERR Negated to HALT Negated (Rerun)
tBNHN
0—0—
ns
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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