SIGNAL DESCRIPTIONS

B.3 DEFAULT CONDITIONS

Table B-5 lists the default functions of the I/O and control pins of the 8XC196NP and 80C196NU with their values during various operating conditions. Table B-4 defines the symbols used to rep- resent the pin status. Refer to the DC Characteristics table in the datasheet for actual specifica- tions for VOL, VIL, VOH, and VIH.

Table B-4. Definition of Status Symbols

Symbol

Definition

 

Symbol

Definition

 

 

 

 

 

0

Voltage less than or equal to VOL, VIL

 

MD0

Medium pull-down

1

Voltage greater than or equal to VOH, VIH

 

MD1

Medium pull-up

HiZ

High impedance

 

WK0

Weak pull-down

LoZ0

Low impedance; strongly driven low

 

WK1

Weak pull-up

LoZ1

Low impedance; strongly driven high

 

ODIO

Open-drain I/O

Table B-5. 8XC196NP and 80C196NU Pin Status

 

 

 

Upon

 

Power-

 

 

 

Multiplexed

During

 

down

 

 

 

RESET#

 

(NP/NU)

 

Bus

Port Pins

RESET#

Idle

Hold

With

Inactive

and

Idle

 

Active

 

 

 

 

(Note 11)

 

Standby

 

 

 

 

 

 

 

 

 

 

 

 

 

(NU only)

 

 

 

 

 

 

 

 

 

 

P1.3:0

EPA3:0

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P1.4

T1CLK

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P1.5

T1DIR

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P1.6

T2CLK

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P1.7

T2DIR

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P2.0

TXD

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P2.1

RXD

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P2.2

EXTINT0

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P2.3

BREQ#

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P2.4

EXTINT1

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P2.5

HOLD#

WK1

WK1

(Note 1)

(Note 1)

Force 0

—

P2.6

HLDA#

WK1

WK1

(Note 1)

(Note 1)

0

—

P2.7

CLKOUT

CLKOUT

CLKOUT

(Note 1)

(Note 2)

(Note 1)

—

 

 

active;

active;

 

 

 

 

 

 

LoZ0/1

LoZ0/1

 

 

 

 

P3.0

CS0#

WK1

1 (NP only)

(Note 3)

(Note 3)

(Note 4)

—

 

 

 

0 (NU only)

 

 

 

 

P3.5:1

CS5:1#

WK1

WK1

(Note 3)

(Note 3)

(Note 4)

—

P3.6

EXTINT2

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P3.7

EXTINT3

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

P4.2:0

PWM2:0

WK1

WK1

(Note 1)

(Note 1)

(Note 1)

—

B-13

Page 387 Page 389
Page 388
Image 388
Intel 8XC196NP Default Conditions, Table B-4. Definition of Status Symbols, Table B-5 XC196NP and 80C196NU Pin Status
Page 387 Page 389

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.
Top Page Image Contents