AT24C256C_09 Datasheet, PDF (7/21 Pages) ATMEL Corporation – Two-wire Serial EEPROM

AT24C256C [Preliminary]
SOFTWARE RESET: After an interruption in protocol, power loss or system reset, any 2-wire part can be protocol reset
by following these steps:
a) Create a start bit condition,
b) Clock 9 cycles,
c) Create another start bit followed by stop bit condition as shown below.
The device is ready for next communication after above steps has been completed.
Figure 4. Software Reset
Start bit
Dummy Clock Cycles
Start bit
Stop bit
SCL
1
2
3
8
9
SDA
Figure 5. Bus Timing
SCL
SDA IN
t_SU.STA
SDA OUT
t_F
t_LOW
t_HD.STA
t_HIGH
t_HD.DAT
t_LOW
t_SU.DAT
t_AA
t_DH
Figure 6. Write Cycle Timing
SCL
t_R
t_SU.STO
t_BUF
SDA
8th BIT
WORDn
ACK
STOP
CONDITION
(1)
t_wr
START
CONDITION
7
8568A–SEEPR–9/09