Operation

M41T01

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DocID025389 Rev 2

2.2

READ mode

In this mode, the master reads the M41T01 slave after setting the slave address (see

Figure 6). Following the WRITE mode control bit (R/W = 0) and the acknowledge bit, the

word address An is written to the on-chip address pointer. Next the START condition and

slave address are repeated, followed by the READ mode control bit (R/W = 1). At this point,

the master transmitter becomes the master receiver. The data byte which was addressed

will be transmitted and the master receiver will send an acknowledge bit to the slave

transmitter. The address pointer is only incremented on reception of an acknowledge bit.

master receiver reads and acknowledges the new byte and the address pointer is

This cycle of reading consecutive addresses will continue until the master receiver sends a

STOP condition to the slave transmitter.

An alternate READ mode may also be implemented, whereby the master reads the M41T01

slave without first writing to the (volatile) address pointer. The first address that is read is the

last one stored in the pointer (see Figure 7 on page 11).

Figure 6. Slave address location

AI00602

R/W

SLAVE ADDRESS

START

A

0

100

0

11