DESCRIPTION
The ISSI IS42G32256 is a high-speed 16-Mbit CMOS Synchronous Graphics RAM organized as 256K words x 32 bits x 2 banks. With SGRAM, all input and output signals are synchronized with the rising edge of the system clock. Programmable Mode Register and Special Registers provide a choice of Read or Write burst lengths of 1, 2, 4, or 8 locations or a Full Page with burst termination options. The SGRAM performance is enhanced with the Write-per-bit (WPB) and eight columns of Block Write functions.

FEATURES
• 256,144 words x 32 bits x 2-bank organization
• All inputs are sampled at the positive going edge of the system clock
• Dual internal bank control
• Single 3.3V ± 3V power supply
• Programmable mode register
    – Burst length (1, 2, 4, 8, and full page)
    – CAS latency (2 and 3)
    – Burst type: Sequential and Interleave
• Burst Read single-bit Write Operation
• Refresh capability
    – Auto, self-refresh
• 2,048 refresh cycles/32 ms
• LVTTL compatible inputs and outputs
• 100-pin PQFP (14mm x 20mm)

GRAPHIC FEATURES
• SMRS cycle
    – Load mask register
    – Load color register
• Write per bit (old mask)
• Block write (eight columns)