N34C04 Datasheet, PDF (7/11 Pages) ON Semiconductor – 4-Kb Serial SPD EEPROM for DDR4 DIMM

N34C04
SCL
SDA
8th Bit
Byte n
ACK
t_WR
STOP
CONDITION
Figure 6. EEPROM Write Cycle Timing
START
CONDITION
ADDRESS
BUS ACTIVITY: ^S
T
A
MASTER R
T
SDA LINE S
SLAVE
SLAVE
ADDRESS
BYTE
ADDRESS (n)
DATA n
DATA n+1
A
A
A
A
C
C
C
C
K
K
K
K
NOTE: In this example n = XXXX 0000(B); X = 1 or 0
Figure 7. EEPROM Page Write
S
T
DATA n+P ^O
P
P
A
C
K
ADDRESS
BYTE
DATA
BYTE
1
8
9
1
8
SCL
SDA
a₇
a₀
d₇
d₀
t_SU:WP
WP
t_HD:WP
Figure 8. WP Timing
BUS ACTIVITY: ^S
N
T
OS
A
MASTER R
T
SLAVE
ADDRESS
AT
CO
KP
SDA LINE S
P
SLAVE
A
C
DATA
K
Figure 9. EEPROM Immediate Read
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