87C196CB Supplement

 

 

Table A-3. Signal Descriptions (Continued)

Name

Type

Description

 

 

 

P6.7:0

I/O

Port 6

 

 

This is a standard 8-bit bidirectional port.

 

 

Port 6 is multiplexed as follows: P6.0/EPA8/COMP0, P6.1/EPA9/COMP1,

 

 

P6.2/T1CLK, P6.3/T1DIR, P6.4/SC0, P6.5/SD0, P6.6/SC1, and P6.7/SD1.

PACT#

O

Programming Active

 

 

During auto programming or ROM-dump, a low signal indicates that

 

 

programming or dumping is in progress, while a high signal indicates that the

 

 

operation is complete.

 

 

PACT# is multiplexed with P2.7 and CLKOUT.

PALE#

I

Programming ALE

 

 

During slave programming, a falling edge causes the device to read a

 

 

command and address from the PBUS.

 

 

PALE# is multiplexed with P2.1 and RXD.

PBUS15:0

I/O

Address/Command/Data Bus

 

 

During slave programming, ports 3 and 4 serve as a bidirectional port with

 

 

open-drain outputs to pass commands, addresses, and data to or from the

 

 

device. Slave programming requires external pull-up resistors.

 

 

During auto programming and ROM-dump, ports 3 and 4 serve as a regular

 

 

system bus to access external memory. P4.6 and P4.7 are left unconnected;

 

 

P1.1 and P1.2 serve as the upper address lines.

 

 

Slave programming:

 

 

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

 

 

PBUS.15:8 are multiplexed with AD15:8 and P4.7:0.

 

 

Auto programming:

 

 

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

 

 

PBUS.13:8 are multiplexed with AD13:8 and P4.5:0; PBUS15:14 are

 

 

multiplexed with P1.2:1.

PMODE.3:0

I

Programming Mode Select

 

 

The value on the PMODE pins determines the programming mode:

 

 

0H = serial port programming

 

 

5H = slave programming

 

 

6H = ROM-dump

 

 

CH = auto programming

 

 

PMODE is sampled after a device reset and must be static while the part is

 

 

operating.

 

 

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

PLLEN

I

Phase-locked Loop Enable

 

 

This input pin enables and disables the on-chip clock multiplier feature.

 

 

0 = standard mode; internal frequency is equal to FXTAL1.

 

 

1 = quadruple mode; internal frequency is equal to 4FXTAL1.

A-10

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Intel 8XC196NT, 87C196CB user manual Slave programming, Auto programming, PMODE.30
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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.
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