EPM7032AETC44-10N Datasheet, PDF (14/64 Pages) Altera Corporation – Programmable Logic Device

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 V_CC, 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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Altera Corporation