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US 6,661,696 B2Granted
Ferroelectric random access memory configurable output driver circuit
AssigneeRamtron International Corporation
InventorsKurt Schwartz, Michael Alwais
Life of this patent
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Abstract
A FRAM configurable output driver circuit allows the user to configure the output driver for either CMOS level push/pull operation or true open drain operation. This configuration is stored in a non-volatile memory including a FRAM cell and a standard logic latch. The configuration data is restored to the latch on powerup. The user is able to change the configuration at any time. Any changes to the configuration are stored in the non-volatile memory.
Claims12
An output driver circuit comprising:
- an output stage coupled to an output pad;
- and
- a non-volatile control logic circuit coupled to the output stage for configuring the output stage as either a push/pull output driver circuit or an open drain output driver.
Dependencies are inferred from the claim text.