INTEGRATED CIRCUIT AND LOW POWER METHOD OF OPERATION

摘要

A system-on-chip device operates in a low power mode and keeps on-board peripherals such as FIFO registers operational by maintaining a low frequency bit clock and gating other clock sources. When a peripheral device initiates a DMA (direct memory access) operation, the SOC's bus clock is enabled in response to a signal generated by the peripheral. Once data has been moved between the peripheral and system memory, the bus clock can be gated again.

主权项

1. A method of operating an integrated circuit device, the method comprising:
exchanging data between a peripheral device internal to the integrated circuit and a remote device external to the integrated circuit under the control of a bit rate clock signal; disabling a bus clock signal in a first mode of operation; and enabling the bus clock signal and exchanging data between the peripheral device and system memory under the control of the bus clock signal in a second mode of operation.