
AT93C56A/66A
Table 6. Organization Key for Timing Diagrams
AT93C56A (2K)
AT93C66A (4K)
I/O
x8
x 16
x8
AN
A8(1)
A7(2)
A8
DN
D7
D15
D7
Notes: 1. A8 is a DON’T CARE value, but the extra clock is required.
2. A7 is a DON’T CARE value, but the extra clock is required.
x 16
A7
D15
Figure 3. READ Timing
CS
tCS
SK
DI
High Impedance
DO
Figure 4. EWEN Timing
CS
tCS
SK
DI
1 0 01 1
Figure 5. EWDS Timing
CS
...
tCS
SK
DI
1
0000
...
7
3378K–SEEPR–12/06