Abstract: An integrated circuit (300) includes a suspend circuit that includes a first input to receive a suspend signal, a first output to generate an awake signal, and outputs to provide control signals to various integrated circuit resources. During suspend mode, the suspend circuit suspends operation of the integrated circuit resources by driving its output pins to one of a plurality of predefined state selected by corresponding mode select signals and by locking its synchronous elements to known states. Upon termination of suspend mode, the circuit re-activates the integrated circuit resources according to a user-defined timing schedule. The user-defined timing schedule and the mode select signals may be provided to the integrated circuit during its configuration as part of a configuration bitstream.

Abstract: A method and apparatus to facilitate low-power consumption through a configurable suspend mode of operation of a PLD, the PLD comprising an application logic block coupled to receive configuration data bits and adapted to implement a logic application in response to the configuration data bits, a suspend pin coupled to receive a suspend signal, a write protect block coupled to the application logic block and adapted to prohibit the application logic block from changing logic states in response to a suspend mode initiated by the suspend signal; and an awake pin adapted to provide an awake signal that is indicative of a status of the suspend mode.

Abstract: A PLD (200) includes a power management unit (PMU 210) that selectively implements one or more different power-reduction techniques in response to power configuration signals (PC). By manipulating the PC signals, the PMU can independently enable/disable various supply voltage circuits (110, 120, 130) that power CLBs (101), IOBs (102), and configuration memory cells (106), can generate a capture signal that causes data stored in storage elements of the CLBs to be captured in configuration memory cells, and/or can switch power terminals of configuration memory cells between voltage supply circuits. Also, the PMU can sequentially apply and remove power from a number of configurable PLD portions in response to the PC signals, wherein each configurable portion may include any number of the PLD's resources.

Abstract: A configuration memory array for a programmable logic device includes an array of configuration memory cells arranged in rows and columns. Initially, each of the configuration memory cells is reset to a reset state. Each row of configuration memory cells is coupled to a corresponding data line and data line driver. During configuration, each data line driver drives a configuration data value having a first state or a second state onto the corresponding data line. A configuration data value having the first state has a polarity that tends to flip the reset state of a configuration memory cell. A repeater cell is connected to an intermediate location of each data line. Each repeater cell improves the drive of configuration data values having the first state.