X24F064/032/016

8

Sequential Read

Sequential reads can be initiated as either a current

address read or random access read. The first byte is

transmitted as with the other modes, however, the

master now responds with an acknowledge, indicating

it requires additional data. The X24F064/032/016

continues to output data for each acknowledge

received. The read operation is terminated by the

master; by not responding with an acknowledge and

then issuing a stop condition.

The data output is sequential, with the data from

address n followed by the data from n + 1. The

address counter for read operations increments all

address bits, allowing the entire memory contents to

be serially read during one operation. At the end of the

address space, the counter “rolls over” to 0 and the

X24F064/032/016 continues to output data for each

acknowledge received. Refer to Figure 8 for the

address, acknowledge and data transfer sequence.

Figure 8. Sequential Read

BUS ACTIVITY:

MASTER

SDA LINE

BUS ACTIVITY:

X24F016/032/064

SLAVE

ADDRESS

A

C

K

6686 ILL F13.1

A

C

K

DATA n+x

S

T

O

P

P

DATA n

A

C

K

DATA n+1

A

C

K

DATA n+2

Figure 9. Typical System Configuration

MASTER

TRANSMITTER/

RECEIVER

SLAVE

RECEIVER

SLAVE

TRANSMITTER/

RECEIVER

MASTER

TRANSMITTER

MASTER

TRANSMITTER/

RECEIVER

PULL-UP

RESISTORS

SDA

SCL

VCC

6686 ILL F14