82C55A

STB

IBF

INTR

RD

INPUT FROM PERIPHERAL

tST

tSIB

tPS

tSIT

tPH

tRIB

tRIT

FIGURE 7. MODE 1 (STROBED INPUT)

INTR (Interrupt Request)

A “high” on this output can be used to interrupt the CPU when and input device is requesting service. INTR is set by the condition: STB is a “one”, IBF is a “one” and INTE is a “one”. It is reset by the falling edge of RD. This procedure allows an input device to request service from the CPU by simply strobing its data into the port.

INTE A

Controlled by bit set/reset of PC4.

INTE B

INTE A

Controlled by Bit Set/Reset of PC6.

INTE B

Controlled by Bit Set/Reset of PC2.

NOTE:

1.To strobe data into the peripheral device, the user must operate the strobe line in a hand shaking mode. The user needs to send OBF to the peripheral device, generates an ACK from the pe- ripheral device and then latch data into the peripheral device on the rising edge of OBF.

Controlled by bit set/reset of PC2.

Output Control Signal Definition

(Figure 8 and 9)

OBF - Output Buffer Full F/F). The OBF output will go “low” to indicate that the CPU has written data out to be specified port. This does not mean valid data is sent out of the part at this time since OBF can go true before data is available.

Data is guaranteed valid at the rising edge of OBF, (See Note 1). The OBF F/F will be set by the rising edge of the WR input and reset by ACK input being low.

ACK - Acknowledge Input). A “low” on this input informs the 82C55A that the data from Port A or Port B is ready to be accepted. In essence, a response from the peripheral device indicating that it is ready to accept data, (See Note 1).

INTR - (Interrupt Request). A “high” on this output can be used to interrupt the CPU when an output device has accepted data transmitted by the CPU. INTR is set when ACK is a “one”, OBF is a “one” and INTE is a “one”. It is reset by the falling edge of WR.

CONTROL WORD

D7 D6 D5 D4 D3 D2 D1 D0

1

0

1

1

1/0

 

 

 

 

 

 

 

 

 

 

 

PC4, PC5

1 = INPUT

0 = OUTPUT

WR

CONTROL WORD

D7 D6 D5 D4 D3 D2 D1 D0

1

1

0

WR

MODE 1 (PORT A)

 

PA7-PA0

8

 

PC7

OBFA

INTE

PC6

ACKA

A

 

 

 

PC3

INTRA

 

PC4, PC5

2

 

 

MODE 1 (PORT B)

 

PB7-PB0

8

 

PC1

OBFB

INTE

PC2

ACKB

B

 

 

 

PC0

INTRB

FIGURE 8. MODE 1 OUTPUT

9

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Diamond Systems RUBY-MM-1612 user manual Intr Interrupt Request, Output Control Signal Definition
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RUBY-MM-1612, 16-Channel 12-Bit Analog Output PC/104 Module specifications

The Diamond Systems RUBY-MM-1612 is a versatile 16-channel 12-bit analog output PC/104 module designed to meet the demanding needs of various applications requiring precise analog signal generation. This module excels in environments ranging from industrial automation to scientific research, providing users with reliable performance and high-quality output.

Key features of the RUBY-MM-1612 include its capability to deliver 16 independent analog output channels. Each of these channels supports a resolution of 12 bits, enabling the generation of finely detailed signals for a wide range of applications. The analog outputs are voltage scalable, allowing users to select various output ranges, which enhances the module's flexibility in different system configurations.

Another notable characteristic is the onboard architecture, which employs a specialized digital-to-analog converter (DAC) with excellent linearity and minimal noise, ensuring that the output signals are both accurate and stable. The DAC's specifications allow for output signals with a maximum voltage range of ±10V, providing ample headroom for many applications.

In terms of connectivity, the module utilizes the PC/104 standard, known for its ruggedness and compact form factor. This design allows for easy integration into systems, making it ideal for space-constrained environments. The RUBY-MM-1612 features a robust interface that supports various protocols, ensuring compatibility with a wide array of PC/104 systems.

The module also includes a comprehensive set of support software tools, making it user-friendly for developers. The drivers and libraries provided for various programming environments simplify the process of integrating the module into existing systems, reducing development time and effort.

Additionally, the RUBY-MM-1612 is built for durability, with operational specifications that accommodate a wide temperature range. This reliability makes it suitable for outdoor installations and harsh conditions, where other systems may fail.

In summary, the Diamond Systems RUBY-MM-1612 is an advanced 16-channel 12-bit analog output PC/104 module that combines high performance with flexibility and ease of integration. Its robust features, modern technologies, and durability make it an excellent choice for engineers and developers looking for reliable solutions in analog signal generation. Whether in industrial control systems, data acquisition, or laboratory settings, the RUBY-MM-1612 stands out as a top-tier option for fulfilling complex analog output requirements.
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