Overview
The TL16C552AFNR, produced by Texas Instruments, is an enhanced dual-channel asynchronous communications element (ACE) designed for use in microcomputer or microprocessor-based systems. This device serves two serial input/output interfaces simultaneously and includes a bidirectional parallel data port, making it compatible with IBM PC/AT systems. It supports both serial and parallel communication, integrating the functionality of three system ports into a single device.
The TL16C552AFNR features 16-byte FIFOs for each channel, reducing CPU interrupts and supporting a clock rate of up to 16 MHz. It also includes a programmable baud rate generator and supports various modem control and status functions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (VDD) | 4.75 - 5.25 | V |
| Clock Frequency (fclock) | Up to 16 | MHz |
| Operating Temperature (TA) - I suffix | -40 to 85 | °C |
| Operating Temperature (TA) - M suffix | -55 to 125 | °C |
| Package Type | 68-pin Plastic-Leaded Chip-Carrier (FN), 80-pin TQFP (PN) | |
| FIFO Size | 16 bytes per channel | |
| Baud Rate Generator | Programmable, divides clock by 1 to (2^16 - 1) |
Key Features
- Dual asynchronous communications element (ACE) with two TL16C550 ACEs.
- 16-byte FIFOs for each channel to reduce CPU interrupts.
- Programmable baud rate generator.
- Bidirectional parallel data port supporting Centronics-type printer interface.
- IBM PC/AT compatible.
- Supports modem control and status functions.
- Internal pullup resistors on several lines (e.g., AFD, STB, SLIN).
- Interrupt generation capabilities (e.g., INT2 for printer port interrupt).
Applications
- Microcomputer or microprocessor-based systems requiring multiple serial and parallel communication interfaces.
- IBM PC/AT compatible systems needing integrated serial and parallel ports.
- Embedded systems requiring robust asynchronous communication capabilities.
- Industrial automation and control systems.
- Telecommunication equipment.
Q & A
- What is the TL16C552AFNR?
The TL16C552AFNR is an enhanced dual-channel asynchronous communications element (ACE) produced by Texas Instruments.
- What are the key features of the TL16C552AFNR?
It includes dual ACEs, 16-byte FIFOs, a programmable baud rate generator, and a bidirectional parallel data port.
- What is the maximum clock frequency supported by the TL16C552AFNR?
The device supports a clock frequency of up to 16 MHz.
- What types of packages are available for the TL16C552AFNR?
The device is available in 68-pin plastic-leaded chip-carrier (FN) and 80-pin TQFP (PN) packages.
- Is the TL16C552AFNR compatible with IBM PC/AT systems?
Yes, it is IBM PC/AT compatible and supports the parallel Centronics-type printer interface.
- What is the purpose of the FIFOs in the TL16C552AFNR?
The 16-byte FIFOs reduce CPU interrupts by buffering data during serial communication.
- How does the baud rate generator work in the TL16C552AFNR?
The baud rate generator is programmable and can divide the timing reference clock input by a divisor between 1 and (2^16 - 1).
- What are some common applications of the TL16C552AFNR?
Common applications include microcomputer or microprocessor-based systems, IBM PC/AT compatible systems, embedded systems, industrial automation, and telecommunication equipment.
- Does the TL16C552AFNR support modem control and status functions?
Yes, it supports various modem control and status functions through its internal registers.
- How does the interrupt generation work in the TL16C552AFNR?
The device generates interrupts, such as the printer port interrupt (INT2), based on specific conditions like the positive transition of ACK.
