Motorola MC68VZ328 用户手册
AC Electrical Characteristics
Electrical Characteristics
19-3
Figure 19-1. CLKO Reference to Chip-Select Signals Timing Diagram
19.3.2
Chip-Select Read Cycle Timing
Figure 19-2 on page 19-4 shows the read cycle timing used by chip-select. The signal values and units of
measure for this figure are found in Table 19-4 on page 19-4. For detailed information about the individual
signals, see Chapter 6, “Chip-Select Logic.”
measure for this figure are found in Table 19-4 on page 19-4. For detailed information about the individual
signals, see Chapter 6, “Chip-Select Logic.”
Table 19-3. CLKO Reference to Chip-Select Signals Timing Parameters
Number
Characteristic
(3.0 ± 0.3) V
Unit
Minimum
Maximum
1
CLKO high to CSx asserted
—
10
ns
2
CLKO low to CSx
negated
—
12
ns
3
CLKO high to RASx asserted
—
10
ns
4
CLKO high to RASx
negated
—
12
ns
5
CLKO high to CASx asserted
—
10
ns
6
CLKO high to CASx
negated
—
12
ns
CLKO
S0
S2
S4
WS
S6
S0
CSx
RASx
CASx
1
3
5
6
2
4