Information processing device, printing device, and control method

摘要

An information processing device having plural control units appropriately executes an arbitration process when a control unit is hibernating (in power-saving mode) and transmits data correctly to an external device. The information processing device has a first CPU and a second CPU; a first memory embedded in a semiconductor chip including the first CPU and second CPU; and a second memory disposed externally to the semiconductor chip. The first CPU executes an arbitration process according to the type of event that occurred when the first CPU is in a first state, the second CPU and the second memory are in a second state different from the first state, and an event requiring sending data from the first memory to the second memory occurs.

主权项

1. An information processing device with multiple operating modes, comprising:
a reception interface circuit including a first-in-first-out (FIFO) memory in which data sent from a host is first received and stored; a data storage; a controller; and a dynamic memory access (DMA) circuit; the controller reading data stored in the FIFO memory sequentially and transferring the data to, and storing the data in, the data storage when the operating mode is a first operating mode in which the controller is operating in a high speed state, and
the DMA circuit reading data stored in the FIFO memory sequentially without going through the controller, and transferring and storing the data in the data storage when the operating mode is a second operating mode in which the controller is operating in a low speed state.