BU9877FV Datasheet, PDF (9/9 Pages) Rohm – Serial interface IC for DIMMs supporting plug & play

Memory ICs
BU9877FV
Start condition
1
SCL
89
17 18
Stop condition
26 27
SDA
0
1
1
0 A2 A1 A0 0
DON'T CARE
DON'T CARE
Slave address
Word address
Write data
ACK signal (output)
Fig. 11 Write protect cycle
• The write protect command is used to prohibit writing of data to addresses 00 to 7Fh, among the 256 word address
data, and cannot be altered (one-time memory).
• The command is canceled if a stop condition has been input before the 27th clocks.
• If the write protect command is input when the protect status is already in effect, the command is canceled.
•^{External dimensions (Units: mm)}
3.0 ± 0.2
85
14
(0.52) 0.65 0.22 ± 0.1
0.3Min.
0.1
SSOP-B8
9