87C196CB Supplement

 

Table A-2. Description of Columns of Table A-3

Column Heading

 

Description

 

 

 

Name

 

Lists the signals, arranged alphabetically. Many pins have two functions, so

 

 

there are more entries in this column than there are pins. Every signal is

 

 

listed in this column.

Type

 

Identifies the pin function listed in the Name column as an input (I), output

 

 

(O), bidirectional (I/O), power (PWR), or ground (GND).

 

 

Note that all inputs except RESET# are sampled inputs. RESET# is a level-

 

 

sensitive input. During powerdown mode, the powerdown circuitry uses

 

 

EXTINT as a level-sensitive input.

Description

 

Briefly describes the function of the pin for the specific signal listed in the

 

 

Name column. Also lists the alternate fuction that are multiplexed with the

 

 

signal (if applicable).

 

 

Table A-3. Signal Descriptions

Name

Type

Description

 

 

 

A23:16

I/O

Address Lines 16–23

(100-pin CB)

 

These address lines provide address bits 20–23 during the entire external

 

 

 

 

memory cycle, supporting extended addressing of the 16-Mbyte address space.

 

 

A23:20 are multiplexed with EPORT.7:0.

A19:16

I/O

Address Lines 16–19

(84-pin CB)

 

These address lines provide address bits 16–19 during the entire external

 

 

 

 

memory cycle, supporting extended addressing of the 1 Mbyte address space.

 

 

NOTE: Internally, there are 24 address bits; however, only 20 address lines

 

 

(A19:16 and AD15:0) are implemented as external pins on the 84-pin

 

 

87C196CB. The internal address space is 16 Mbytes (000000–

 

 

FFFFFFH) and the external address space is 1 Mbyte (00000–

 

 

FFFFFH). The device resets to FF2080H in internal OTPROM or

 

 

F2080H in external memory.

 

 

A19:16 are multiplexed with EPORT.3:0.

ACH7:0

I

Analog Channels 0–7

 

 

These pins are analog inputs to the A/D converter.

 

 

These pins may individually be used as analog inputs (ACHx) or digital inputs

 

 

(P0.x). While it is possible for the pins to function simultaneously as analog and

 

 

digital inputs, this is not recommended because reading port 0 while a

 

 

conversion is in process can produce unreliable conversion results.

 

 

The ANGND and VREF pins must be connected for the A/D converter and port 0

 

 

to function.

 

 

ACH7:4 are multiplexed with P0.7:4 and PMODE.3:0. ACH3:0 are multiplexed

 

 

with P0.3:0.

AD15:0

I/O

Address/Data Lines

 

 

These pins provide a multiplexed address and data bus. During the address

 

 

phase of the bus cycle, address bits 0–15 are presented on the bus and can be

 

 

latched using ALE or ADV#. During the data phase, 8- or 16-bit data is trans-

 

 

ferred.

 

 

AD7:0 are multiplexed with SLP7:0, P3.7:0, and PBUS.7:0. AD15:8 are

 

 

multiplexed with P4.7:0 and PBUS.15:8.

A-4

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Intel 8XC196NT, 87C196CB user manual Table A-3. Signal Descriptions, Column Heading Description Name

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.