XM20C64

3

TABLE 1

Step

Operation

Data Pattern

1

Write

555

AA

2

Write

2AA

55

3

Write

555

Command

3874 PGM T11

TABLE 2

Command

Function

CC[H]

Enable Autostore

CD[H]

Disable Autostore

33[H]

Store Operation

3874 PGM T12.2

* It should be noted, the high order addresses should remain

stable during the operations. It should also be noted that these

commands are not global, that is only one device on the module

will be affected by each command operation.

Command Sequence

Note:

All Write Command Sequence timings must conform to the standard write timing requirements.

Command Sequence Timing Limits

Limits

Symbol

Parameter

Min.

Max.

Units

Store Time

5

ms

Command Write Pulse Width

50

ns

Inter Command Delay

55

ns

3874 PGM T01.1

3874 FHD F03.1

ADDRESS

555

2AAA

555

OE

CE

WE

NE

DATA IN

tSTO

tSP

CMD

55

AA

tDH

tDS