Ds80249 P Rev 12 Schematic Link

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| DS80249‑P  Rev 12 – Schematic Overview    |
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| • PDF Link (OEM):  https://…/DS80249-P_R12.pdf |
| • Revision Date: 2023‑09‑15               |
| • Main Power Net: VIN → PWR_IN → VCC (5 V) |
| • Key ICs: U1 – STM32F401, U2 – TLV2455 |
| • Notable Changes from Rev 11:           |
|   – R73 (10 k → 4.7 k)                     |
|   – Added TVS D5 (ESD protection)        |
|   – Updated MOSFET Q3 (IRLZ44N → IRLZ34)   |
| • BOM Extraction: copy Table 3 → Excel    |
| • Test‑Points: TP‑01 (VCC), TP‑07 (UART_TX) |
| • Safety: Do NOT power board > 12 V      |
| • Legal: Internal use only – © OEM 2023 |
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The DS80C320 is a high-speed, 8051-compatible microcontroller. While the standard 8051 architecture is decades old, this specific chip remains relevant in legacy system maintenance and specific industrial applications due to its speed and power efficiency. Print this on a sticky note or add

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