DATA SHEET
S524A40X11/40X21/40X41/60X81/60X51 SERIAL EEPROM
SEQUENTIAL READ OPERATION
Sequential read operations can be performed in two ways: as a series of current address reads or as random
address reads. The first data is sent in the same way as the previous read mode used on the bus. The next time,
however, the master responds with an ACK, indicating that it requires additional data.
The S524A40X11/40X21/40X41/60X81/60X51 continues to output data for each ACK it receives. To stop the
sequential read operation, the master does not respond with an ACK, but instead issues a Stop condition.
Using this method, data is output sequentially with the data from address “n” followed by the data from “n+1”. The
word address pointer for read operations increments all word addresses, allowing the entire EEPROM to be read
sequentially in a single operation. After the entire EEPROM is read, the word address pointer “rolls over” and the
S524A40X11/40X21/40X41/60X81/60X51 continues to transmit data for each ACK it receives from the master
(see Figure 1-14).
Start Slave Address
Data (n)
Data (n + x)
A
C
K
A
C
K
A
C
K
N
O
A
C
K
Figure 1-14. Sequential Read Operation
1-13
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