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D8155HC
The D8155HC is a programmable I/O device manufactured by IntelD8155HC
The D8155HC is a programmable I/O device manufactured by Intel
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D8155HC DataSheet
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Details
The D8155HC is a programmable peripheral interface (PPI) chip produced by Intel. It belongs to the 8-bit MCS-85 family of microcontrollers. The chip features 24 input/output lines that can be individually programmed as input or output. Additionally, it includes three 8-bit bidirectional I/O ports (Ports A, B, and C), which can be configured to operate in various modes such as simple I/O, strobed I/O, handshaking, and interrupt-controlled I/O. The D8155HC also integrates a timer/counter with two 8-bit registers and a 14-bit prescaler. It operates with a single +5V power supply and is compatible with most microprocessors. The chip is widely used in embedded systems, industrial automation, and control applications due to its versatility and programmability
Key Features
- 2048 x 8 RAM
- 256 x 4 ROM
- 8-bit parallel I/O port
- Three 16-bit timer/counters
- Interrupt control
- Memory mapped I/O
- High-speed operation
Application
- Industrial control systems
- Embedded systems
- Communications equipment
- Robotics
- Automotive electronics
- Medical devices
- Security systems
- Consumer electronics
- Power management systems
- Instrumentation
Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
| Manufacturer | NEC | Product Category ! | IC Chips |
FAQs
What is D8155HC?
The D8155HC is a programmable peripheral interface chip designed by Intel. It combines input/output ports, timers, and system control functions in a single integrated circuit. It is commonly used in applications such as microprocessor systems, industrial control systems, and embedded devices.
How Does D8155HC Work?
The D8155HC functions as a versatile peripheral interface chip that can be programmed to handle various input/output operations, timers, and other system control tasks. It interfaces with the microprocessor and external devices to manage data transfer and control functions based on the programmed instructions.
How Many Pins does D8155HC have and What are the Functions of the Pinout Configuration?
The D8155HC is housed in a 40-pin DIP (Dual Inline Package) package. The pinout configuration includes:
- Port A, Port B: I/O ports for data transfer.
- Port C: I/O port with control signals.
- RD, WR: Read and write control signals.
- CS: Chip select input for device activation.
- Interrupt Request: IRQ output for interrupt signaling.
- VCC, GND: Power supply and ground pins.
What are the Pros and Cons of D8155HC?
Pros:
- Integration: Combines multiple functions in a single chip, reducing external component count.
- Programmability: Can be configured for specific system requirements through programming.
- Versatility: Supports a variety of input/output operations and control functions.
- System Expansion: Allows for interfacing with external devices and expansion modules.
- Compatibility: Designed for compatibility with Intel microprocessors and common system architectures.
Cons:
- Complexity: Requires understanding of programming and interfacing for proper usage.
- Obsolete: Being an older chip, availability and support may be limited.
- Power Consumption: Depending on the application, power consumption may be higher compared to modern alternatives.
Are There Any Equivalents/Alternatives to D8155HC for Recommendation?
- The 8255 from Intel is a similar programmable peripheral interface chip.
- Alternatives to the D8155HC include the Z80 CTC from Zilog and the MC6840 from Motorola.
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