MAX7000A データシートの表示（PDF） - Altera Corporation

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MAX7000A

Programmable Logic Device Family

Altera Corporation 

MAX 7000A Programmable Logic Device Data Sheet

Figure 6. I/O Control Block of MAX 7000A Devices

6 or 10 Global

Output Enable Signals (1)

PIA

OE Select Multiplexer

VCC

To Other I/O Pins

From

Macrocell

GND

Open-Drain Output

Slew-Rate Control

Fast Input to

Macrocell

Register

To PIA

Note:

(1) EPM7032AE, EPM7064AE, EPM7128A, EPM7128AE, EPM7256A, and EPM7256AE devices have six output enable

signals. EPM7512AE devices have 10 output enable signals.

When the tri-state buffer control is connected to ground, the output is

tri-stated (high impedance) and the I/O pin can be used as a dedicated

input. When the tri-state buffer control is connected to VCC, the output is

enabled.

The MAX 7000A architecture provides dual I/O feedback, in which

macrocell and pin feedbacks are independent. When an I/O pin is

configured as an input, the associated macrocell can be used for buried

logic.

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