Overview
The SM5906AF is a shock-proof memory controller LSI for video CD players. The operating mode can be set to CD-DA mode, V-CD mode, or Super V-CD mode, and external memory can be selected from 2 options (4M, 16M). It operates from a 2.7 to 3.6 V supply voltage range.

FEATUREs
– 2-channel processing
– Serial data input
   • 2s complement, 16-bit/MSB first
   • Right-justified format
   • Wide capture function
      (up to 4 × speed input rate)
   • Selectable 16/24/32-bit clock
– System clock input
   • 384fs (16.9344 MHz)
– Shock-proof memory controller
   • Selectable CD-DA/V-CD/SVC mode
   • 2 external DRAM configurations selectable
      1 × 16M DRAM (4M × 4 bits, refresh cycle =
      2048 cycle)
      1 × 4M DRAM (1M × 4 bits)
– Microcontroller interface
   • Serial command write and status read-out
   • Data residual detector:
      11-bit operation, 16-bit output
      (Bits 13 to 15 bit are fixed LOW.)
   • Forced mute
– Extension I/O
   Microcontroller interface for external control
   using 3 extension I/O pins
– +2.7 to +3.6 V operating voltage range
– Schmitt inputs
   All input pins (including I/O pins) except CLK
   (system clock)
– Reset signal noise elimination
   Approximately 3.8 µs or longer (65 system
   clock pulses) continuous LOW-level reset
- 48-pin QFP package (0.5 mm pin pitch)