Semiconductor device for battery control and battery pack

摘要

A semiconductor device for battery control includes a CPU, a first bus coupled to the CPU, a second bus not coupled to the CPU, and a protective function circuit for protecting a battery from stress applied thereto. The semiconductor device also includes a non-volatile memory storing trimming data, a trimming circuit to perform trimming required to allow the protective function circuit to exert a protective function, and a bus control circuit capable of selectively coupling the first bus and the second bus to the non-volatile memory. The semiconductor device further includes a transfer logic circuit which causes, by making the bus control circuit select the second bus, a trimming data transfer path leading from the non-volatile memory to the trimming circuit to be formed and the trimming data stored in the non-volatile memory to be transferred to the trimming circuit without involving the CPU.

主权项

1. A semiconductor device for battery control comprising:
a CPU; a first bus coupled to the CPU; a second bus not coupled to the CPU; a protective function circuit for protecting a battery from stress applied thereto; a non-volatile memory storing trimming data; a trimming circuit to perform trimming required to allow the protective function circuit to exert a protective function; a bus control circuit capable of selectively coupling the first bus and the second bus to the non-volatile memory, and a transfer logic circuit which causes, by making the bus control circuit select the second bus, a trimming data transfer path leading from the non-volatile memory to the trimming circuit to be formed and the trimming data stored in the non-volatile memory to be transferred to the trimming circuit without involving the CPU, wherein, in accordance with the trimming data received via the second bus, the trimming circuit performs trimming required to allow the protective function circuit to exert a protective function.