13-44

8XC196NP, 80C196NU USER’S MANUAL

	Table 13-16. AC Timing Definitions (Continued)
Symbol	Definition

	The 8XC196Nx Meets These Specifications (Continued)

TRHAX	(Multiplexed Mode) AD15:8/CSx# Hold after RD# High
	Minimum time the high byte of the address in 8-bit mode will be valid after RD# inactive.
	(Demultiplexed Mode) A19:0/CSx# Hold after RD# High
	Minimum time the address will be valid after RD# inactive.

TRHBX	BHE#, INST Hold after RD# High
	Minimum time these signals will be valid after RD# inactive.

TRHLH	RD# High to ALE Rising
	Time between RD# going inactive and the next ALE. Useful in calculating time between RD#
	inactive and next address valid.

TRHRL	RD# High to RD# Low
	Minimum RD# inactive time.

TRHSH	A19:0/CSx# Hold after RD# High
	Minimum time the address and chip-select output are held after RD# inactive.

TRLAZ	RD# Low to Address Float
	Used to calculate when the device stops driving address on the bus.

TRLCH	RD# Low to CLKOUT High
	Maximum time between RD# being asserted and CLKOUT going high.

TRLCL	RD# Low to CLKOUT Low
	Length of time from RD# asserted to CLKOUT falling edge.

TRLRH	RD# Low to RD# High
	RD# pulse width.

TWHAX	(Multiplexed Mode) AD15:8/CSx# Hold after WR# High
	Minimum time the high byte of the address in 8-bit mode will be valid after WR# inactive.
	(Demultiplexed Mode) A19:0/CSx# Hold after WR# High
	Minimum time the address will be valid after WR# inactive.

TWHBX	BHE#, INST Hold after WR# High
	Minimum time these signals will be valid after WR# inactive.

TWHLH	WR# High to ALE High
	Time between WR# going inactive and next ALE. Also used to calculate WR# inactive and next
	Address valid.

TWHQX	Data Hold after WR# High
	Length of time after WR# rises that the data stays valid on the bus.

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, 80C196NU, Microcontroller manual 13-44

Models: Microcontroller 80C196NU 8XC196NP

8XC196NP, 80C196NU USER’S MANUAL

Table 13-16. AC Timing Definitions (Continued)

Symbol

WR# High to ALE High

13-44

Microcontroller, 80C196NU, 8XC196NP specifications