ROHM BR25L320-W

BR25Lxxx-W series is a serial EEPROM of SPI BUS interface method.

• High speed clock action up to 5MHz (Max.)
• Wait function by HOLD terminal
• Part or whole of memory arrays settable as read only memory area by program
• 1.8V to 5.5V single power source action most suitable for battery use
• Page write mode useful for initial value write at factory shipment
• Highly reliable connection by Au pad and Au wire
• For SPI bus interface (CPOL, CPHA) = (0,0), (1,1)
• Auto erase and auto end function at data rewrite
• Low current consumption
  • At write action (5V): 1.5mA (Typ.)
  • At read action (5V): 1.0mA (Typ.)
  • At standby action (5V): 0.1μA (Typ.)
• Address auto increment function at read action
• Write mistake prevention function
  • Write prohibition at power on
  • Write prohibition by command code (WRDI)
  • Write prohibition by WP pin
  • Write prohibition block setting by status registers (BP1, BP0)
  • Write mistake prevention function at low voltage
• Data kept for 40 years
• Data rewrite up to 1,000,000 times
• This IC has status registers. The status registers are of 8 bits and express the following parameters. BP0 and BP1 can be set by write status register command. These 2 bits are memorized into the EEPROM, therefore are valid even when power source is turned off.
• Rewrite characteristics and data hold time are same as characteristics of the EEPROM.
• WEN can be set by write enable command and write disable command. WEN becomes write disable status when power source is turned off. R/B is for write confirmation, therefore cannot be set externally.
• The value of status register can be read by read status command.