| Part Number | B89C51S |
| Manufacturer | Beijing Microelectronics |
| Title | Micro controller |
| Description | Ver 1.3 B89C51S ：B89C51S 1.0 2014-7 —— 1.1 2015-10 7.1 1.2 2017-7 7.2 1.3 2018-2 —— BM89C51 7.2 ， ， B89C51S 、 ..... |
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| Datasheet |
 B89C51S Datasheet
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