It cannot be called a 1-bit microcontroller, but a 1-bit processor or "Industrial Control Unit (ICU)".
I rummaged through my college technical notebook (haha, although it is basically useless, I always carry it with me). At that time, I used a page to record the relevant information and design of the 1-bit processor.
Typical model: MC14500, its data bus is only 1 bit wide, so it is called a 1-bit microprocessor, and its internal circuit structure has the typical characteristics of a microprocessor. The ICU has 16 instructions including input, output, logical operation, jump, etc., which are input through 4-bit registers, and data input and output interact on a 1-bit data "bus", processing only 1 bit at a time instead of serial input and output. This chip is a product of Motorola. If you are interested, you can download its datasheet.
Click the following address and paste MC14500B to find it. http://www.datasheetcatalog.com/
Keywords：ICU MC14500
Reference address：What is a 1-bit microcontroller?
I rummaged through my college technical notebook (haha, although it is basically useless, I always carry it with me). At that time, I used a page to record the relevant information and design of the 1-bit processor.
Typical model: MC14500, its data bus is only 1 bit wide, so it is called a 1-bit microprocessor, and its internal circuit structure has the typical characteristics of a microprocessor. The ICU has 16 instructions including input, output, logical operation, jump, etc., which are input through 4-bit registers, and data input and output interact on a 1-bit data "bus", processing only 1 bit at a time instead of serial input and output. This chip is a product of Motorola. If you are interested, you can download its datasheet.
Click the following address and paste MC14500B to find it. http://www.datasheetcatalog.com/
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