Description
ECG6809, NMOS 1MHz 8-Bit Microprocessing Unit (MPU/CPU) ~ 40 Pin DIP (NTE6809)
Philips ECG ECG6809, NMOS 1MHz 8-Bit Microprocessing Unit (MPU/CPU) with Internal Oscillator and Clock Generator ~ 40 Pin DIP (NTE6809)
ARCHITETURAL FEATURES:
- Two 16–Bit Index Registers
- Two 16–Bit Indexable Stack Pointers
- Two 8–Bit Accumulators can be Concatenated to Form One 16–Bit Accumulator
- Direct Page Register Allows Direct Addressing Throughout Memory
HARDWARE FEATURES:
- On–Chip Oscillator (Crystal Frequency = 4 x E),
- DMA/BREQ Allows DMA Operation on Memory Refresh
- Fast Interrupt Request Input Stacks Only Condition Code Register and Program Counter
- MRDY Input Extends Data Across Times for Use with Slow Memory
- Interrupt Acknowledge Output Allows Vectoring by Devices
- Sync Acknowledge Output Allows for Synchronization to External Event
- Single Bus–Cycle RESET
- Single 5V Supply Operation
- NMI Inhibited After RESET Until After First Load Stack Pointer
- Early Address Valid Allows Use with Slower Memories
- Early Write Data for Dynamic Memories
- 40 Pin DIP Package
- Replaces NTE6809
