10

RM24EP

DS-RM24EP–048C–6/2014

10.2

Random Read

Random read operations allow the master to access any memory location in a random manner. To perform a Random

Read, first the address to be accessed must be set. This is done by sending the address to the device as part of a write

terminates the write operation, but the address pointer will be set to the address sent. The master then issues the same

byte located at the address location written. The master will not acknowledge the transfer of the data byte, but will instead

generate a STOP condition, which causes the device to discontinue transmission. See Figure 10-2. After the Random

Read operation, the internal address counter will increment to the address location following the one that was just read.

Figure 10-2. Random Read

10.3

Sequential Read

Sequential read allows the whole memory contents to be serially read during one operation. Sequential Read is initiated

in the same way as a Random Read except that after the device transmits the first data byte, the master issues an

acknowledge instead of a STOP condition. This acknowledge from the master directs the device to transmit the next

sequentially addressed byte (See Figure 10-3). Following the final byte transmitted to the master, the master will not

generate an acknowledge, but will generate a STOP condition which causes the device to discontinue transmission.

To provide the Sequential Read, the device contains an internal address pointer which is incremented by one at each

acknowledge received by the master, and by the STOP condition.

Figure 10-3. Sequential Read