
11-8
MC68349 USER'S MANUAL
MOTOROLA
11.7 AC TIMING SPECIFICATIONS (See notes (a), (b), and (c) corresponding to part operation,
GND = 0 Vdc, TA = 0 to 70
°C; see numbered notes; see Figures 11-2–11-11)
3.3 V or
5.0 V
16.78 MHz
25.16 MHz
Num.
Characteristic
Symbol
Min
Max
Min
Max
Unit
6
CLKOUT High to Address, FC, SIZx, RMC Valid
tCHAV
030
0
20
ns
7
CLKOUT High to Address, Data, FC, SIZx, RMC High
Impedance
tCHAZx
0
60
0
40
ns
8
CLKOUT High to Address, FC, SIZx, RMC Invalid
tCHAZn
0—0—
ns
99
CLKOUT Low to AS , DS, CS, IFETCH , IPIPE≈, IACK≈
Asserted
tCLSA
3
30
3
20
ns
9A2
AS to DS or CS Asserted (Read)
tSTSA
–15
15
–6
6
ns
11
Address, FC, SIZx, RMC Valid to AS, CS (and DS Read)
Asserted
tAVSA
15
—
10
—
ns
12
CLKOUT Low to AS
, DS, CS, IFETCH,
IPIPE≈, IACK≈
Negated
tCLSN
3
30
3
20
ns
13
AS , DS, CS, IACK≈ Negated to Address, FC, SIZ Invalid
(Address Hold)
tSNAI
15
—
10
—
ns
14
AS , CS (and DS Read) Width Asserted
tSWA
100
—
70
—
ns
14A
DS Width Asserted (Write)
tSWAW
45
—
30
—
ns
14B
AS , CS, IACK≈ (and DS Read) Width Asserted (Fast
Termination Cycle)
tSWDW
40
—
30
—
ns
153
AS , DS, CS Width Negated
tSN
40
—
30
—
ns
16
CLKOUT High to AS , DS, R/ W High Impedance
tCHSZ
—60
—
40
ns
17
AS , DS, CS Negated to R/W High
tSNRN
15
—
10
—
ns
18
CLKOUT High to R/W High
tCHRH
030
0
20
ns
20
CLKOUT High to R/W Low
tCHRL
030
0
20
ns
219
R/ W High to AS , CS Asserted
tRAAA
15
—
10
—
ns
22
R/ W Low to DS Asserted (Write)
tRASA
70
—
47
—
ns
23
CLKOUT High to Data-Out Valid
tCHDO
—30
—
20
ns
24
Data-Out Valid to Negating Edge of AS, CS , (Fast
Termination Write)
tDVASN
15
—
10
—
ns
25
DS, CS , Negated to Data-Out Invalid (Data-Out Hold)
tSNDOI
15
—
10
—
ns
26
Data-Out Valid to DS Asserted (Write)
tDVSA
15
—
10
—
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)
tBELCL
20
—
10
—
ns
28
AS , DS Negated to DSACK≈ , BERR , HALT Negated
tSNDN
080
0
50
ns
294
DS, CS Negated to Data-In Invalid (Data-In Hold)
tSNDI
0—0—
ns
29A4
DS, CS Negated to Data-In High Impedance
tSHDI
—60
—
40
ns