仕様

• • Three independently operated 19-bit counters
  • Binary/BCD count operation
  • Multiple Latch command for easy monitoring
  • Counter Latch command
  • Six count modes available for each counter
    • Interrupt at the End of the Count
    • GATE Re-triggerable One-Shot
    • Rate Generator
    • Square Wave Generator
    • Software-Triggered Strobe
    • Re-triggerable Hardware-Triggered Strobe
  • Functionally based on 8254