4.0 Electrical/Mechanical Specifications
CX28394/28395/28398
4.5 MPU Interface Timing
Quad/x16/Octal—T1/E1/J1 Framers
4.5 MPU Interface Timing
Figure 4-5. Motorola Asynchronous Read Cycle
MOTO* = 0, SYNCMD = 0
1
AS*
2
A[8:0]
Address
3
CS*
R/W*
DS*
4
5
AD[7:0]
Read Data
Table 4-8. Motorola Asynchronous Read Cycle
Symbol
Parameter
AS* high pulse width
Minimum
Maximum
Units
1
2
3
4
15
5
—
—
—
80
ns
ns
ns
ns
A[8:0] Address setup to AS* low
A[8:0] Address hold after AS* low
10
—
CS* low and R/W* high, and DS* low to AD[7:0]
valid
5
CS* high and DS* high, and R/W* low to AD[7:0]
invalid/three-state
5
20
ns
4-8
Conexant
100054E
CONEXANT [ CONEXANT SYSTEMS, INC ]
