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Description
The 77M70 is an 8-bit microcomputer that belongs to the 3807 group, based on the 740 family core technology. It is designed for systems that control motors of office equipment and household appliances. The 77M70 features two serial I/Os, an A-D converter, a D-A converter, a real-time output port function, a watchdog timer, and an analog comparator. It is available in various variations of internal memory size and packaging.
Specifications and features
- Basic machine-language instructions: 71
- Minimum instruction execution time: 0.5 µs (at 8 MHz oscillation frequency)
- Memory size:
- ROM: 8 to 60 K bytes
- RAM: 384 to 2048 bytes
- Programmable input/output ports: 68
- Software pull-up resistors (Ports P0 to P2): 24
- Input ports (Ports P63 and P64): 2
- Interrupts: 20 sources, 16 vectors
- Timers X, Y: 16-bit ✕ 2
- Timers A, B (for real-time output port function): 16-bit ✕ 2
- Timers 1–3: 8-bit ✕ 3
- Serial I/O1 (UART or Clock-synchronized): 8-bit ✕ 1
- Serial I/O2 (Clock-synchronized): 8-bit ✕ 1
- A-D converter: 8-bit ✕ 13 channels
- D-A converter: 8-bit ✕ 4 channels
- Watchdog timer: 16-bit ✕ 1
- Analog comparator: 1 channel
- 2 Clock generating circuit:
- Main clock (XIN–XOUT): Internal feedback resistor
- Sub-clock (XCIN–XCOUT): Without internal feedback resistor (connect to external ceramic resonator or quartz-crystal oscillator)
- Power source voltage:
- In high-speed mode: 4.0 to 5.5 V (at 8 MHz oscillation frequency and high-speed selected)
- In middle-speed mode: 2.7 to 5.5 V (at 8 MHz oscillation frequency and middle-speed selected)
- In low-speed mode: 2.7 to 5.5 V (at 32 kHz oscillation frequency and low-speed selected)
- Power dissipation:
- In high-speed mode: 34 mW (at 8 MHz oscillation frequency, at 5 V power source voltage)
- In low-speed mode: 60 µW (at 32 kHz oscillation frequency, at 3 V power source voltage)
- Memory expansion: possible
- Operating temperature range: –20 to 85 °C
Application Scenarios
The 77M70 is commonly used in LBP engine control, PPC, FAX, office equipment, household appliances, and consumer electronics.
Comparison
Advantages- Powerful feature set and capabilities for controlling motors of office equipment and household appliances
Disadvantages- Limited memory size options
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Datasheet
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Additional Information
- Datasheet: Download 77M70
- Chipdatas Part: CD94-77M70
- Warehouse: China, Hong Kong
- Dispatch: Within 24 hours
- Free Shipping: Yes
- Prority Shipping: Yes, 3-5 days
- Last Updated: 2024/06/14 06:10 +0800
Refund
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- Full Refund if you don't receive your order
- Full or Partial Refund , If the item is not as described
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