MAX 7000 Programmable Logic Device Family Data Sheet
By using an external 5.0-V pull-up resistor, output pins on MAX
7000S devices can be set to meet 5.0-V CMOS input voltages. When
VCCIO is 3.3 V, setting the open drain option will turn off the output
pull-up transistor, allowing the external pull-up resistor to pull the
output high enough to meet 5.0-V CMOS input voltages. When
VCCIO is 5.0 V, setting the output drain option is not necessary
because the pull-up transistor will already turn off when the pin
exceeds approximately 3.8 V, allowing the external pull-up resistor to
pull the output high enough to meet 5.0-V CMOS input voltages.
Slew-Rate Control
The output buffer for each MAX 7000E and MAX 7000S I/O pin has
an adjustable output slew rate that can be configured for low-noise
or high-speed performance. A faster slew rate provides high-speed
transitions for high-performance systems. However, these fast
transitions may introduce noise transients into the system. A slow
slew rate reduces system noise, but adds a nominal delay of 4 to 5 ns.
In MAX 7000E devices, when the Turbo Bit is turned off, the slew
rate is set for low noise performance. For MAX 7000S devices, each
I/O pin has an individual EEPROM bit that controls the slew rate,
allowing designers to specify the slew rate on a pin-by-pin basis.
MAX 7000 devices can be programmed on Windows-based PCs with
the Altera Logic Programmer card, the Master Programming Unit
(MPU), and the appropriate device adapter. The MPU performs a
continuity check to ensure adequate electrical contact between the
adapter and the device.
Programming with
External Hardware
For more information, see the Altera Programming Hardware Data
Sheet.
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The Altera development system can use text- or waveform-format
test vectors created with the Text Editor or Waveform Editor to test
the programmed device. For added design verification, designers
can perform functional testing to compare the functional behavior of
a MAX 7000 device with the results of simulation. Moreover, Data
I/O, BP Microsystems, and other programming hardware
manufacturers also provide programming support for Altera
devices.
For more information, see the Programming Hardware Manufacturers.
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