Programmable Timer Module (PTM) DIP-28

Programmable Timer Module (PTM) DIP-28

Designed to provide variable system time intervals, the MC6840 has three 16-bit binary counters, three corresponding control registers, and a status register.

Features

• Operates from a single 5V power supply
• Fully TTL-compatible
• Single system clock required (enable)
• Selectable pre-scaler on timer 3 capable of 8 MHz
• Programmable interrupts (IRQ) output to MPU
• Readable down counter indicated counts to go until time-out
• Selectable gating for frequency or pulse-width comparison
• Three asynchronous external clock and gate trigger inputs internally synchronized
• Three masked outputs
• DIP-28

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