ACE24C512C Datasheet, PDF (11/18 Pages) ACE Technology Co., LTD. – Two-wire serial EEPROM

ACE24C512C
Two-wire serial EEPROM
(B) Random Read
Figure10：Current Address Read
A Random Read requires a “dummy” byte write sequence to load in the data word address. Once the
device address word and data word address are clocked in and acknowledged by the ACE24C512C,
the microcontroller must generate another start condition. The microcontroller now initiates a Current
Address Read by sending a device address with the read/write select bit high. The ACE24C512C
acknowledges the device address and serially clocks out the data word. The microcontroller does
not respond with a “0” but does generate a following stop condition (see Figure 11).
(C) Sequential Read
Figure11：Random Read
Sequential Reads are initiated by either a Current Address Read or a Random Address Read. After
the microcontroller receives a data word, it responds with acknowledge. As long as the
ACE24C512C receives acknowledge, it will continue to increment the data word address and serially
clock out sequential data words. When the memory address limit is reached, the data word address
will roll-over and the Sequential Read will continue. The Sequential Read operation is terminated
when the microcontroller does not respond with a “0” but does generate a following stop condition
(see Figure 12)
VER 1.1 11