24C128SC データシートの表示（PDF） - Atmel Corporation

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24C128SC

Two-wire Serial EEPROM Smart Card Modules 128K (16,384 x 8) 256 (32,768 x 8)

Atmel Corporation 

Figure 12. Random Read

address and serially clocks out the data word. The microcontroller does not respond

with a zero but does generate a following stop condition (refer to Figure 12).

P0

Notes: 1. * = DON’T CARE bit

2. † = DON’T CARE bit for the 128K

SEQUENTIAL 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

an acknowledge. As long as the EEPROM receives an 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 sequen-

tial read will continue. The sequential read operation is terminated when the

microcontroller does not respond with a zero but does generate a following stop condi-

tion (refer to Figure 13).

Figure 13. Sequential Read

10 AT24C128SC/AT24C256SC

1661B–SEEPR–04/04

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