Processor M37705M… this is a sixteen-bit single-chip microcomputer with 64 pins, which can be found on the control boards of washing machines.There are several varieties of processor that differ in letters after 37705M … in the photo, the M4B453SP processor, it was not possible to find a specification for it.In the photo, the M2AX pinout … is an approximate analogue.
The CPU is a 16-bit parallel processor that can be switched to 8-bit parallel processing.It contains a built-in motor control circuit, which is suitable in devices where electric motor control is required.The amount of ROM memory is 16KBYTES, RAM 512 bytes.Power supply-5 Volts.It can be used to control office equipment, personal computers, typewriters, etc.
Here is the diagram of the washing machine where this processor is used.
