Block Transfer Mode, Single Transfer Mode Ptscb

STANDARD AND PTS INTERRUPTS

Table 6-5. Single Transfer Mode PTSCB

Unused

PTSDST (HI) = 60H

PTSDST (LO) = 00H

PTSSRC (HI) = 00H

PTSSRC (LO) = 20H

PTSCON = 85H (Mode = 100, BW = 0, SI/SU = 0, DI/DU = 1)

PTSCOUNT = 09H

6.6.4Block Transfer Mode

In block transfer mode, an interrupt causes the PTS to move a block of bytes or words from one memory location to another. See AP-445, 8XC196KR Peripherals: A User’s Point of View, for ap- plication examples with code. Figure 6-13 shows the PTS control block for block transfer modes.

In this mode, each PTS cycle consists of the transfer of an entire block of bytes or words. Because a PTS cycle cannot be interrupted, the block transfer mode can create long interrupt latency. The worst-case latency could be as high as 500 states, if you assume a block transfer of 32 words from one external memory location to another, using an 8-bit bus with no wait states. See Table 6-4 on page 6-10 for execution times of PTS cycles.

The PTSCB in Table 6-6 sets up three PTS cycles that will transfer five bytes from memory loca- tions 20–24H to 6000–6004H (cycle 1), 6005–6009H (cycle 2), and 600A–600EH (cycle 3). The source and destination are incremented after each byte transfer, but the original source address is reloaded into PTSSRC at the end of each block-transfer cycle. In this routine, the PTS always gets the first byte from location 20H.

Table 6-6. Block Transfer Mode PTSCB

Unused

PTSBLOCK = 05H

PTSDST (HI) = 60H

PTSDST (LO) = 00H

PTSSRC (HI) = 00H

PTSSRC (LO) = 20H

PTSCON = 17H (Mode = 000; DI, SI, DU, BW = 1; SU = 0)

PTSCOUNT = 03H

6-23

Microcontroller, 80C196NU, 8XC196NP specifications

The Intel 8XC196NP and 80C196NU microcontrollers are part of Intel's renowned 16-bit microcontroller series that gained popularity in the 1980s and 1990s for embedded systems applications. Designed for a variety of applications, these microcontrollers are characterized by their robust performance, versatility, and industry-standard architecture.

The 8XC196NP features an enhanced instruction set with over 100 instructions, allowing for efficient code execution. It operates at clock speeds up to 16 MHz, which contributes to improved performance in time-sensitive applications. The microcontroller is equipped with a 16-bit data bus, enabling more efficient data handling compared to its 8-bit predecessors, thus accommodating complex algorithms and large data sets.

In terms of memory architecture, the 8XC196NP supports an addressable memory space of up to 64 KB of program memory and 64 KB of data memory. This configuration provides sufficient space for large applications while ensuring fast data access. The microcontroller includes integrated features such as timers, serial I/O capabilities, and interrupt processing, which enhance its functionality for real-time applications and control mechanisms.

The 80C196NU, on the other hand, is designed for lower power operation, making it suitable for battery-powered devices. This microcontroller maintains similar features to the 8XC196NP while offering advancements that support low-power consumption. The 80C196NU can also function in a range of temperature environments, making it adaptable for industrial applications.

Both the 8XC196NP and 80C196NU support external memory interfacing, allowing designers to expand the system's capability by connecting additional ROM and RAM. This flexibility makes them appealing for developing complex systems, such as motor controls, industrial automation, and consumer electronics.

Another standout feature of these microcontrollers is their built-in debugging capabilities. Intel provided hardware and software tools that enabled developers to test and troubleshoot their applications effectively, reducing the development time and increasing reliability.

Overall, the Intel 8XC196NP and 80C196NU microcontrollers stand out for their dependability, versatility, and performance, contributing significantly to the evolution of embedded system design. Their legacy continues to influence modern microcontroller technology, ensuring their relevance in a wide array of applications today.

Intel 8XC196NP manual Single Transfer Mode Ptscb, Block Transfer Mode Ptscb, Ptscount = 09H

Models: Microcontroller 80C196NU 8XC196NP