4

X24001

Programming Operation

Programming of the X24001 is performed one byte at a

time. After each byte is written, a delay equal to the write

cycle time of 5ms must be observed before initiating the

next write cycle.

The sequence of operations is: first raise the SCL pin to

(programming mode start). This is followed by eight bits

of data containing the program command bits, four

address bits and two don’t care bits, immediately fol-

lowed by the 8-bit data byte.

The timing of the operation conforms to the standard

A.C. timing requirements and follows the sequence

shown below. After generating the Programming Mode

Factory Programming Service

The X24001 can be programmed with customer specific

data prior to shipment. The data programmed can be in

two forms: static data pattern where there is no change

in the data in a group of devices or sequential data, such

as a base number incremented by one for each device

tested and shipped.

Customers requiring one of these services should con-

tact their local sales office for ordering procedures and

service charges.

Figure 3. Programming Sequence

VPGM

VIH

SDA

0

1

A3 A2 A1 A0 XX XX D7 D6 D5 D4 D3 D2 D1 D0

S

T

A

R

T

SCL

3830 FHD F05.1