CX28394/28395/28398
4.0 Electrical/Mechanical Specifications
Quad/x16/Octal—T1/E1/J1 Framers
4.5 MPU Interface Timing
Figure 4-10. Motorola Synchronous Write Cycle
MOTO* = 0, SYNCMD = 1
MCLK
1
11
AS*
2
12
A[8:0]
DTACK*
CS*
Address
3
4
5
6
R/W*
9
10
DS*
7
AD[7:0]
Write Data
8
Table 4-13. Motorola Synchronous Write Cycle
Symbol
Parameter
AS* high pulse width
Minimum
Maximum
Units
1
2
15
—
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
A[8:0] Address setup to AS* low
A[8:0] Address hold after AS* low
AS* and CS* low to DTACK* low
AS* or CS* high to DTACK* high
CS* and R/W* low to DS* low
AD[7:0] setup to DS* low
5
—
3
2
—
4
0
10
5
0
10
6
2
—
7
2
—
8
AD[7:0] hold after DS* low
DS* setup to MCLK high
5
—
9
2
—
—
10
11
12
DS* hold after MCLK high
5
—
DS* sampled low to data latch (internal)
DS* sampled low to AS* high
1/MCLK+15
—
1/2 MCLK + 15
100054E
Conexant
4-13
CONEXANT [ CONEXANT SYSTEMS, INC ]
