8XC196NP, 80C196NU USER’S MANUAL

ADDRMSKx

Address:

Table 13-5

x = 0–5

Reset State:

 

The address mask (ADDRMSKx) register, together with the address compare register, defines the address range that is assigned to the chip-select x output, CSx#. The address mask register determines the size of the address range, which must be 2n bytes, where n = 8, 9, . . , 20. For a 2n- byte address range, calculate n1 = 20 – n, and set the n1 most-significant bits of MASK19:8 in the address mask register.

15

—

—

—

—

 

 

 

 

7

MASK15 MASK14 MASK13 MASK12

8

MASK19 MASK18 MASK17 MASK16

0

MASK11

MASK10

MASK9

MASK8

 

 

 

 

Bit

Bit

Function

Number

Mnemonic

 

 

 

 

15:12

—

Reserved; for compatibility with future devices, write zeros to these bits.

 

 

 

11:0

MASK19:8

Address Mask Bits

 

 

For a 2n-byte address range, set the n most-significant bits of

 

 

1

 

 

MASK19:8, where n1 = 20 – n.

Figure 13-3. Address Mask (ADDRMSKx) Register

Table 13-5. ADDRMSKx Addresses and Reset Values

Register

Address

Reset Value

 

 

 

ADDRMSK0

1F42H

XFFFH

 

 

 

ADDRMSK1

1F4AH

XFFFH

 

 

 

ADDRMSK2

1F52H

XFFFH

 

 

 

ADDRMSK3

1F5AH

XFFFH

 

 

 

ADDRMSK4

1F62H

XFFFH

 

 

 

ADDRMSK5

1F6AH

XFFFH

 

 

 

13-8

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Intel 8XC196NP, 80C196NU, Microcontroller manual Addrmsk Address Reset State, Register Address Reset Value
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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.
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