Description
The µPD23C256112A is a 256 Mbit NAND interface programmable mask read-only memory that operates with a single power supply. The memory organization consists of (512 + 16 (Redundancy)) bytes x 32 pages x 2,048 blocks. The µPD23C256112A is a serial type mask ROM in which addresses and commands are input and data output serially via the I/O pins.
The µPD23C256112A is packed in 48-pin PLASTIC TSOP(I).

Features
• Word organization
    (33,554,432 + 1,048,576Note) words by 8 bits
• Page size
    (512 + 16Note) by 8 bits
• Block size
    (16,384 + 512Note) by 8 bits
    Note Underlined parts are redundancy.
    Caution Redundancy is not programmable parts and is fixed to all FFH.
• Operation mode
    READ mode (1), READ mode (2), READ mode (3), RESET, STATUS READ, ID READ
• Operating supply voltage : VCC = 3.3 ± 0.3 V
• Access Time
    Memory cell array to starting address : 7 µs (MAX.)
    Read cycle time : 50 ns (MIN.)
    /RE access time : 35 ns (MAX.)
• Operating supply current
    During read : 30 mA (MAX.) (50 ns cycle operation)
    During standby (CMOS) : 100 µA (MAX.)