SIGNAL DESCRIPTIONS

 

Table A-5. 87C196CB Pin Status (Continued)

 

 

 

 

 

 

Port Pins

Multiplexed

Status During

Status During

Status During

With

Reset

Idle

Powerdown

 

 

 

 

 

 

P2.2

EXTINT

WK1

(Note 3)

(Note 3)

P2.3

BREQ#

WK1

(Note 3)

(Note 3)

P2.4

INTOUT#

WK1

(Note 3)

(Note 3)

P2.5

HOLD#

WK1

(Note 3)

(Note 3)

P2.6

HLDA#

WK1

(Note 3)

(Note 3)

P2.7

CLKOUT

CLKOUT active,

(Note 3)

(Note 4)

LoZ0/1

 

 

 

 

P3.7:0

AD7:0

WK1

(Note 6)

(Note 6)

P4.7:0

AD15:8

WK1

(Note 6)

(Note 6)

EPORT.3:0

AD19:17

WK1

(Note 7)

(Note 7)

P5.0

ALE

WK1

(Note 1)

(Note 1)

P5.1

INST

WK0

(Note 1)

(Note 1)

P5.2

WR#/WRL#

WK1

(Note 3)

(Note 3)

P5.3

RD#

WK1

(Note 3)

(Note 3)

P5.4

SLPINT

WK1

(Note 3)

(Note 3)

P5.5

BHE#/WRH#

WK1

(Note 1)

(Note 1)

P5.6

READY

WK1

(Note 2)

(Note 2)

P5.7

BUSWIDTH

WK1

(Note 2)

(Note 2)

P6.1:0

EPA9:8

WK1

(Note 3)

(Note 3)

P6.2

T1CLK

WK1

(Note 3)

(Note 3)

P6.3

T1DIR

WK1

(Note 3)

(Note 3)

P6.4

SC0

WK1

(Note 3)

(Note 3)

P6.5

SD0

WK1

(Note 3)

(Note 3)

P6.6

SC1

WK1

(Note 3)

(Note 3)

P6.7

SD1

WK1

(Note 3)

(Note 3)

EA#

HiZ

HiZ

HiZ

NMI

HiZ

HiZ

HiZ

RXCAN

WK1

WK1

WK1

TXCAN

LoZ1

LoZ1

LoZ1

VPP

HiZ

LoZ1

LoZ1

XTAL1

Osc input, HiZ

Osc input, HiZ

Osc input, HiZ

XTAL2

Osc output, LoZ0/1

Osc output, LoZ0/1

(Note 5)

NOTES:

 

 

 

 

1.If P5_MODE.y = 0, port is as programmed.

If P5_MODE.y = 1 and HLDA# = 1, P5.0 and P5.1 are LoZ0; P5.5 is LoZ1. If P5_MODE.y = 1 and HLDA# = 0, port is HiZ.

2.If P5_MODE.y = 0, port is as programmed. If P5_MODE.y = 1, port is HiZ.

3.If Px_MODE.y = 0, port is as programmed.

If Px_MODE.y = 1, pin is as specified by Px_DIR and the associated peripheral.

4.If P2_MODE.7 = 0, pin is as programmed. If P2_MODE.7 = 1, pin is LoZ0.

5.If XTAL1 = 0, pin is LoZ1. If XTAL1 = 1, pin is LoZ0.

6.If EA# = 0, port is HiZ. If EA# = 1, port is open-drain I/O (ODIO).

7.Pins configured as address are high-impedance; pins configured as I/O remain unchanged.

A-15

Page 136
Image 136
Intel 87C196CB, 8XC196NT user manual Port Pins Multiplexed

8XC196NT, 87C196CB specifications

The Intel 87C196CB and 8XC196NT are microcontrollers from the C196 family, which was designed to meet the demands of embedded control technology. These microcontrollers are popular in various applications due to their robust architecture, extensive I/O capabilities, and specialized functionality, making them ideal for automotive, industrial, and communication systems.

The 87C196CB is distinguished by its 16-bit architecture, offering a balance of processing power and efficiency. It features a 16-bit data bus, which allows for fast data processing, and a 16-bit address bus, supporting up to 64KB of program memory. The microcontroller integrates on-chip memory, including 2KB of ROM and 128 bytes of RAM, which facilitates faster execution of programs and data handling.

One of the standout features of the 87C196CB is its versatility in I/O operations. It comes equipped with 32 general-purpose I/O lines that can be configured for various functions, including input, output, and interrupt handling. This flexibility enables developers to optimize the microcontroller for their specific application needs.

The 8XC196NT builds on the capabilities of its predecessor, offering advanced functionalities such as an enhanced instruction set and integrated peripherals. It includes additional features like timers, serial communication interfaces, and analog-to-digital converters, which expand its usability in complex embedded systems. The 8XC196NT supports multiple addressing modes, allowing for more efficient programming and memory management.

Both microcontrollers utilize innovative technologies that improve performance and power efficiency. The on-chip operating system support aids in real-time processing and multitasking, making them suitable for time-sensitive applications. Power management features are also incorporated, allowing these microcontrollers to operate in low-power modes, which is crucial for battery-operated devices.

The 87C196CB and 8XC196NT microcontrollers are characterized by their reliability and long service life, meeting the stringent demands of industrial applications. Their ability to perform tasks rapidly, combined with their diverse peripheral support, makes them popular choices among engineers and developers designing embedded systems. Overall, the Intel 87C196CB and 8XC196NT microcontrollers remain relevant in the rapidly evolving landscape of embedded technology, facilitating innovative solutions across various industries.