Selecting the PTS Mode, Ptssrv | Intel 80C196NU, 8XC196NP instruction

STANDARD AND PTS INTERRUPTS

PTSSRV	Address:	0006H
	Reset State:	0000H

The PTS service (PTSSRV) register is used by the hardware to indicate that the final PTS interrupt has been serviced by the PTS routine. When PTSCOUNT reaches zero, hardware clears the corre- sponding PTSSEL bit and sets the PTSSRV bit, which requests the end-of-PTS interrupt. When the end-of-PTS interrupt is called, hardware clears the PTSSRV bit. The PTSSEL bit must be set manually to re-enable the PTS channel.

—	EXTINT3	EXTINT2	OVR2_3
7

EPA0	RI	TI	EXTINT1

OVR0_1	EPA3	EPA2	EPA1

EXTINT0	—	OVRTM1	OVRTM2

Bit		Function
Number		Function
Number

15, 2	Reserved. These bits are undefined.

14:3	A bit is set by hardware to request an end-of-PTS interrupt for the corresponding interrupt
1:0	through its standard interrupt vector.
	The standard interrupt vector locations are as follows.
	Bit Mnemonic	Interrupt	Standard Vector
	EXTINT3	EXTINT3 Pin	FF203CH
	EXTINT2	EXTINT2 Pin	FF203AH
	OVR2_3†	EPA Capture Channel 2 or 3 Overrun	FF2038H
	OVR0_1†	EPA Capture Channel 0 or 1 Overrun	FF2036H
	EPA3	EPA Capture/Compare Channel 3	FF2034H
	EPA2	EPA Capture/Compare Channel 2	FF2032H
	EPA1	EPA Capture/Compare Channel 1	FF2030H
	EPA0	EPA Capture/Compare Channel 0	FF200EH
	RI	SIO Receive	FF200CH
	TI	SIO Transmit	FF200AH
	EXTINT1	EXTINT1 pin	FF2008H
	EXTINT0	EXTINT0 pin	FF2006H
	OVRTM2	Timer 2 Overflow/Underflow	FF2002H
	OVRTM1	Timer 1 Overflow/Underflow	FF2000H

†PTS service is not recommended for multiplexed interrupts. This bit is cleared when both corresponding interrupt pending bits are cleared in EPA_PEND.

Figure 6-10. PTS Service (PTSSRV) Register

6.6.2Selecting the PTS Mode

The second byte of each PTSCB is always an 8-bit value called PTSCON. Bits 5–7 select the PTS mode (Figure 6-11). The function of bits 0–4 differ for each PTS mode. Refer to the sections that describe each mode in detail to see the function of these bits. Table 6-4 on page 6-10 lists the cycle execution times for each PTS mode.

6-19

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 80C196NU, 8XC196NP Selecting the PTS Mode, Ptssrv, EPA3 EPA2 EPA1 EXTINT0 OVRTM1 OVRTM2

Models: Microcontroller 80C196NU 8XC196NP

PTSSRV

EPA3

EPA2

EPA1

EXTINT0

OVRTM1

OVRTM2

Bit

Bit Mnemonic

EXTINT3

Figure 6-10. PTS Service (PTSSRV) Register

6.6.2Selecting the PTS Mode

Microcontroller, 80C196NU, 8XC196NP specifications