GM4151 is a telephone call chip with hands-free calling function. It includes the functions that an analog call chip should have. With the ringing and dialing chips, it can form a complete telephone.
1. Select pin function -- PxSEL, PxSEL2PxSEL2 PxSEL pin function0 0 Used as IO port0 1 Used as the first function pin1 0 Reserved, refer to the manual of the specific model1 1 Used as the second funct
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MCU is different from the resource-rich Linux platform. MCU (such as Cortex M0+ based on Cortex V6M, etc.) Code usually runs in embedded Flash. In some specific applications, some functions need to ru