X24645PI datasheet(8/18 Pages) XICOR

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X24645

Figure 10. Typical System Configuration

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 X24645 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

(address 8191), the counter “rolls over” to 0 and the

X24645 continues to output data for each acknowledge

received.

Refer

Figure

for

the

address,

acknowledge and data transfer sequence.

BUS ACTIVITY:

MASTER

SDA LINE

BUS ACTIVITY:

X24645

SLAVE

ADDRESS

2783 ILL F13

DATA n+x

DATA n

DATA n+1

DATA n+2

MASTER

TRANSMITTER/

RECEIVER

SLAVE

RECEIVER

SLAVE

TRANSMITTER/

RECEIVER

MASTER

TRANSMITTER

MASTER

TRANSMITTER/

RECEIVER

PULL-UP

RESISTORS

SDA

SCL

VCC

2783 ILL F14

Figure 9. Sequential Read

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