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Description
The UPD78C12ACW is a CMOS 8-bit microprocessor that integrates a 16-bit ALU, ROM, RAM, an A/D converter, a multi-function timer/event counter, and a general-purpose serial interface into a single chip. It can also expand its memory (ROM/RAM) externally up to 60K bytes. The UPD78C10ACW is a ROM-less product of the UPD78C11ACW and can directly address external memory up to 64K bytes. The UPD78C12ACW has more built-in ROM capacity than the UPD78C11ACW and its memory (ROM/RAM) can be externally extended up to 56K bytes. These microprocessors operate at low power consumption due to their CMOS construction and have a standby function for low power data retention.
Specifications and features
- Abundant 159 types of instructions: 87AD series instruction set, multiplication/division instructions, 16-bit operation instructions
- Instruction cycle: 0.8 µs (at 15 MHz operation)
- On-chip ROM: 4096W × 8 (UPD78C11ACW), 8192W × 8 (UPD78C12ACW), ROM-less (UPD78C10ACW)
- On-chip RAM: 256W × 8
- High-precision 8-bit A/D converter: 8 analog inputs
- General-purpose serial interface: Asynchronous, synchronous, I/O interface mode
- Multi-function 16-bit timer/event counter
- Two 8-bit timers
- I/O lines: 32 (UPD78C10ACW), 44 (UPD78C11ACW, UPD78C12ACW)
- Interrupt function: External - 3, Internal - 8; Non-maskable interrupt × 1, maskable interrupt × 10
- Standby function: HALT mode, hardware/software STOP mode
- Zero-cross detection function: (2 inputs)
- On-chip pull-up resistor (port A, B, C: UPD78C11ACW, UPD78C12ACW only) by mask optionApplication Scenarios
The UPD78C12ACW is suitable for various applications that require an 8-bit microprocessor with integrated features such as an ALU, ROM, RAM, A/D converter, timer/event counter, and serial interface. It can be used in electronic devices that require low power consumption and have a need for external memory expansion. Some specific application scenarios include industrial control systems, consumer electronics, communication devices, and automotive electronics.
Comparison
Advantages- Integration of multiple features into a single chip
- Expandable external memory (ROM/RAM)
- Low power consumption
- Standby function for low power data retention
- High-precision A/D converter
- Various communication interface modes
- Abundant instruction set
- Multiple timers
- Interrupt function
- On-chip pull-up resistor (for UPD78C11ACW, UPD78C12ACW)Disadvantages- Limited I/O lines compared to other models
- No on-chip ROM in UPD78C10ACW -
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Datasheet
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- Datasheet: Download UPD78C12ACW
- Chipdatas Part: CD94-UPD78C12ACW
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- Last Updated: 2024/06/03 12:05 +0800
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