EPM3256AQC208-10 데이터 시트보기 (PDF) - Altera Corporation

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EPM3256AQC208-10

Programmable Logic Device Family

Altera Corporation 

MAX 3000A Programmable Logic Device Family Data Sheet

Figure 6. I/O Control Block of MAX 3000A 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

to PIA

Note:

(1) EPM3032A, EPM3064A, EPM3128A, and EPM3256A devices have six output enables. EPM3512A devices have

10 output enables.

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 3000A 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.

12

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