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AlbertoVillanuevaEAlbertoVillanuevaE
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feat: update README with electrical characteristics
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‎hardware/README.md‎

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<div align="center">
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# Hardware Design Files
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<div align="center">
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<a href="/hardware/unit_sch_V_0_0_1_ue0090_CH552_USB_Multi-Protocol-Programmer.pdf">
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<img src="resources/Schematics_icon.jpg?raw=false" width="500px">
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<br/>
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Schematics
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</a>
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</div>
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## Key Technical Specifications
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<div align="center">
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| Interface | Description | Signals / Pins | Typical Use |
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|:----------------:|:--------------------------------------------------------:|:-------------------------------------:|:--------------------------------------------------:|
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| **JTAG** | Standard boundary-scan and debug interface | TCK, TMS, TDI, TDO, nTRST | Full chip programming, in-circuit test, debug |
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| **AVR-ISP** | High-speed serial peripheral interface | MOSI, MISO, SCK, CS | Commonly used for programming AVR microcontrollers |
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| **SWD** | ARM's two-wire serial debug and programming interface | SWCLK, SWDIO | Cortex-M programming & step-through debugging |
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| **JST Header** | Compact connector for power + single-wire debug signals | SWC (SWCLK), SWD (SWDIO), VCC, GND | Quick-connect to target board for SWD and power |
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# Pinout
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<a href="unit_pinout_v_0_0_2_ue0090_multi_protocol_programmer_en.pdf">
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<img src="resources/unit_pinout_v_0_0_2_ue0090_multi_protocol_programmer_en.jpg" width="500px">
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<br/>
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Pinout
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</a>
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### Electrical characteristics when the microcontroller is powered with 5V
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| **Parameter** | **Description** | **Min** | **Typ** | **Max** | **Unit** |
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|:-------------:|:--------------------------------------------------------:|:-------:|:-------:|:-------:|:--------:|
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| Vin | Input voltage to power on the module | 3.7 | - | 5.5 | V |
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| Vil | Input low level voltage | -0.4 | - | 1.2 | V |
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| Vih | Input high level voltage | 2.4 | - | Vin+0.4 | V |
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| Vol | Low level output voltage | - | - | 0.4 | V |
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| Voh | High level output voltage | VCC-0.4 | - | - | V |
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| Icc24M* | Total supply current when Fsys=24MHz | 8 | 11 | - | mA |
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| Icc6M | Total supply current when Fsys=6MHz | 4 | 6 | - | mA |
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| Icc750K | Total supply current when Fsys=750KHz | 2 | 3 | - | mA |
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| Iin | The input current without pull-down resistor | -5 | 0 | 5 | uA |
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| Idn5 | The input current with pull-down resistor | -35 | -70 | -140 | uA |
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| Iup5 | The input current with pull-up resistor | 35 | 70 | 140 | uA |
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| IUP5X | The input current with pull-up resistor from low to high | 250 | 400 | 600 | uA |
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| Vpot | Power on reset threshold | 2.1 | 2.3 | 2.5 | V |
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</div>
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*24MHz Fsys only can be used when the microcontroller is working with 5V.
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### Electrical characteristics when the microcontroller is powered with 3.3V
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<div align="center">
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| **Parameter** | **Description** | **Min** | **Typ** | **Max** | **Unit** |
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|:-------------:|:--------------------------------------------------------:|:-------:|:-------:|:-------:|:--------:|
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| Vin | Input voltage to power on the module | 2.8 | 3.3 | 3.6 | V |
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| Vil | Input low level voltage | -0.4 | - | 0.8 | V |
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| Vih | Input high level voltage | 1.9 | - | Vin+0.4 | V |
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| Vol | Low level output voltage | - | - | 0.4 | V |
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| Voh | High level output voltage | VCC-0.4 | - | - | V |
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| Icc12M* | Total supply current when Fsys=12MHz | 3 | 5 | - | mA |
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| Icc6M | Total supply current when Fsys=6MHz | 2 | 4 | - | mA |
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| Icc750K | Total supply current when Fsys=750KHz | 1 | 2 | - | mA |
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| Iin | The input current without pull-down resistor | -5 | 0 | 5 | uA |
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| Idn5 | The input current with pull-down resistor | -15 | -30 | -60 | uA |
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| Iup5 | The input current with pull-up resistor | 15 | 30 | 60 | uA |
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| IUP5X | The input current with pull-up resistor from low to high | 100 | 170 | 250 | uA |
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| Vpot | Power on reset threshold | 2.1 | 2.3 | 2.5 | V |
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---
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*Use the jumper bridge to select the microcontroller's operating voltage.
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# Pinout
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## GPIO Pins
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<a href="unit_pinout_v_0_0_2_ue0090_multi_protocol_programmer_en.pdf">
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<img src="resources/unit_pinout_v_0_0_2_ue0090_multi_protocol_programmer_en.jpg" width="500px">
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<br/>
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Pinout
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</a>
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---
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## GPIO Pins
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### **Protocol SPI**
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# Board Dimensions
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Dimensions
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</a>
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</div>
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# Board Topology
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Topology
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| Ref. | Description |
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|:-----:|:---------------------------------------------------------------------------:|

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