DDR1 / DDR2为内存模块）内存SPD DDR1/DDR2 For memory module SPD Memory
The is a2kbit EEPROM memory with write-protect function having independent rewrite inhibit area, developed for a DIMM that uses synchronous DRAM memory, and a RIMM that uses RAMBUS DRAM memory. This is a memoryIC that reads ID in order for the Plug & Play feature to operate.
Features
1 256k registers ×8 bits serial architecture
2 Single power supply1.8V to 5.5V
3 Two wire serial interface
4 Page Write Function 16byte
5 Write Protect Mode
Write protect 1 One time Rom : 00h to 7Fh
Write protect 2 Hard wire WP PIN : 00h to FFh
6 Low Power consumption
Write 5V : 1.2mATyp.
Read 5V : 0.2mATyp.
Standby5V : 0.1µA Typ.
7DATA security
Write protect feature WP pin
Inhibit to WRITE at low VCC
8 Small package - - - - - - SSOP-B8 pin
9 High reliability fine pattern CMOS technology
10 Endurance : 1,000,000 erase/write cycles
11 Dataretention : 40years
12 Filtered inputs in SCL•SDA for noise suppression
13 Initial data FFh in all address