# RN7211

**RENERGY** · Microcontroller Units (MCUs/MPUs/SOCs) · LQFP-64(7x7)

RN7211 from RENERGY, in a LQFP-64(7x7). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | LDO33 | power_out | 3.3V metering LDO output powering the Sigma-Delta ADC, with 0.1uF and 10uF capacitors connected externally. |
| 2 | AIN4/LVDIN/P04 | bidirectional | P04 GPIO multiplexed with SAR-ADC input AIN4 and LVDIN input (PABUS3 type). |
| 3 | UP | input | Positive analog input of the voltage channel. |
| 4 | UN | input | Negative analog input of the voltage channel. |
| 5 | IBP | input | Positive analog input of current channel B. |
| 6 | IBN | input | Negative analog input of current channel B. |
| 7 | IAP | input | Positive analog input of current channel A, maximum gain 16x; maximum differential input signal is ±1V at PGA=1. |
| 8 | IAN | input | Negative analog input of current channel A. |
| 9 | AGND | power_in | Analog ground. |
| 10 | REFV | passive | Reference input of the Sigma-Delta ADC, with 0.1uF and 10uF capacitors connected externally. |
| 11 | VCC | power_in | 2.8V~5.5V power supply input, decoupled with 10uF in parallel with 0.1uF. |
| 12 | RSTN | input | Active-low reset input with internal pull-up resistor. |
| 13 | XO | output | 32.768kHz passive crystal output; no external resistor or capacitor needed, isolate with ground trace. |
| 14 | XI | input | 32.768kHz passive crystal input; no external resistor or capacitor needed, isolate with ground trace. |
| 15 | P14/KEY4/TC1OUTn0/TCI | bidirectional | GPIO multiplexed with KEY4 input and timer output/input; pull-up, TTL/CMOS level and open-drain selectable. |
| 16 | P15/KEY5/TC1OUTp0/TCI | bidirectional | GPIO multiplexed with KEY5 input and timer output/input; pull-up, TTL/CMOS level and open-drain selectable. |
| 17 | P16/KEY6/TC1OUTn1/TCI | bidirectional | GPIO multiplexed with KEY6 input and timer output/input; pull-up, TTL/CMOS level and open-drain selectable. |
| 18 | P17/KEY7/TC1OUTp1/TCI | bidirectional | GPIO multiplexed with KEY7 input and timer output/input; pull-up, TTL/CMOS level and open-drain selectable. |
| 19 | DGND | power_in | Digital ground. |
| 20 | P110/SPI_SCSN | bidirectional | P11 port SPI chip select; P11 SPI cannot be used simultaneously with P4 SPI; pull-up, TTL/CMOS and open-drain selectable. |
| 21 | P111/SPI_SCLK | bidirectional | P11 port SPI clock; P11 SPI cannot be used simultaneously with P4 SPI; pull-up, TTL/CMOS and open-drain selectable. |
| 22 | P112/SPI_MISO | bidirectional | P11 port SPI MISO; P11 SPI cannot be used simultaneously with P4 SPI; pull-up, TTL/CMOS and open-drain selectable. |
| 23 | P113/SPI_MOSI | bidirectional | P11 port SPI MOSI; P11 SPI cannot be used simultaneously with P4 SPI; pull-up, TTL/CMOS and open-drain selectable. |
| 24 | LDO18 | power_out | 1.8V LDO output, decoupled externally with 10uF in parallel with 0.1uF. |
| 25 | P46/SPI_MISO | bidirectional | P4 port multiplexed with SPI MISO; pull-up, TTL/CMOS and open-drain selectable. |
| 26 | P47/SPI_MOSI | bidirectional | P4 port multiplexed with SPI MOSI; pull-up, TTL/CMOS and open-drain selectable. |
| 27 | DGND | power_in | Digital ground. |
| 28 | P84 | bidirectional | P84 GPIO (PBUSG3, open-drain when GPIO so external pull-up is required). |
| 29 | P83 | bidirectional | P83 GPIO (PBUSG3, open-drain when GPIO so external pull-up is required). |
| 30 | P82 | bidirectional | P82 GPIO (PBUSG3, open-drain when GPIO so external pull-up is required). |
| 31 | P81 | bidirectional | P81 GPIO (PBUSG3, open-drain when GPIO so external pull-up is required). |
| 32 | P80 | bidirectional | P80 GPIO (PBUSG3, open-drain when GPIO so external pull-up is required). |
| 33 | P52/SCL | bidirectional | P5 port multiplexed with I2C SCL; pull-up, TTL/CMOS and open-drain selectable. |
| 34 | P53/SDA | bidirectional | P5 port multiplexed with I2C SDA; pull-up, TTL/CMOS and open-drain selectable. |
| 35 | P54/RX5 | bidirectional | P54 GPIO multiplexed with UART5 input. |
| 36 | P55/TX5 | bidirectional | P55 GPIO multiplexed with UART5 output. |
| 37 | P40/7816CLK | bidirectional | GPIO multiplexed with 7816 clock; pull-up, TTL/CMOS and open-drain selectable. |
| 38 | P41/78160_IO | bidirectional | GPIO multiplexed with bidirectional data port of 7816 interface 0. |
| 39 | P42/78161_IO | bidirectional | GPIO multiplexed with data port of 7816 interface 1 (data output when configured by register). |
| 40 | P43/78161_I/TCI | bidirectional | GPIO multiplexed with 7816 interface 1 data input and timer input. |
| 41 | DGND | power_in | Digital ground. |
| 42 | P20/RX0 | bidirectional | P2 port multiplexed with UART0 input; pull-up, TTL/CMOS and open-drain selectable. |
| 43 | P21/TX0 | bidirectional | P2 port multiplexed with UART0 output; pull-up, TTL/CMOS and open-drain selectable. |
| 44 | P22/RX1 | bidirectional | P2 port multiplexed with UART1 input; pull-up, TTL/CMOS and open-drain selectable. |
| 45 | P23/TX1 | bidirectional | P2 port multiplexed with UART1 output; pull-up, TTL/CMOS and open-drain selectable. |
| 46 | P103 | bidirectional | P103 GPIO (PBUSG3, open-drain when GPIO so external pull-up is required). |
| 47 | P102 | bidirectional | P102 GPIO (PBUSG3, open-drain when GPIO so external pull-up is required). |
| 48 | P37/INT7/HOSCI | bidirectional | P3 port/interrupt/high-frequency crystal input; crystal port needs a 10M ohm series resistor and two 15pF capacitors. |
| 49 | P36/INT6/HOSCO | bidirectional | P3 port/interrupt/high-frequency crystal output; crystal port needs a 10M ohm series resistor and two 15pF capacitors. |
| 50 | P101 | bidirectional | P101 GPIO (PBUSG3, open-drain when GPIO so external pull-up is required). |
| 51 | P100 | bidirectional | P100 GPIO (PBUSG3, open-drain when GPIO so external pull-up is required). |
| 52 | DGND | power_in | Digital ground. |
| 53 | P10/KEY0/TC0OUTn0/TCI | bidirectional | GPIO multiplexed with KEY0 input and timer I/O; pull-up, TTL/CMOS and open-drain selectable. |
| 54 | P11/KEY1/TC0OUTp0/TCI | bidirectional | GPIO multiplexed with KEY1 input and timer I/O; pull-up, TTL/CMOS and open-drain selectable. |
| 55 | P12/KEY2/TC0OUTn1/TCI | bidirectional | GPIO multiplexed with KEY2 input and timer I/O; pull-up, TTL/CMOS and open-drain selectable. |
| 56 | P30/INT0/TCI/TX4 | bidirectional | GPIO multiplexed with external interrupt 0, timer input and UART4 TX; pull-up selectable, Schmitt input, 6mA drive. |
| 57 | P31/INT1/TCI/RX4 | bidirectional | GPIO multiplexed with external interrupt 1, timer input and UART4 RX; pull-up selectable, Schmitt input, 6mA drive. |
| 58 | P32/INT2/RTCOUT | bidirectional | GPIO multiplexed with external interrupt 2 and RTC pulse output; pull-up selectable, Schmitt input, 6mA drive. |
| 59 | P51/QF | bidirectional | P51 GPIO multiplexed with reactive energy pulse output; pull-up selectable, Schmitt input, 6mA drive. |
| 60 | P50/PF | bidirectional | P50 GPIO multiplexed with active energy pulse output; pull-up selectable, Schmitt input, 6mA drive. |
| 61 | P34/INT4/SF | bidirectional | P34 GPIO multiplexed with external interrupt 4 and apparent energy pulse SF; 6mA drive. |
| 62 | P35/INT5/TCI | bidirectional | P35 GPIO multiplexed with external interrupt 5 and timer input; pull-up selectable, Schmitt input, 6mA drive. |
| 63 | SWDCLK/P24/RX2 | bidirectional | SWD clock, UART2 input and P24 multiplexed; pull-up, TTL/CMOS and open-drain selectable. |
| 64 | SWDIO/P25/TX2 | bidirectional | SWD data, UART2 output and P25 multiplexed; pull-up, TTL/CMOS and open-drain selectable. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | RENERGY |
| Package | LQFP-64(7x7) |
| Category | Embedded Processors & Controllers |
| Pins | 64 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Main supply voltage | VCC | 2.8 |  | 5.5 | V | typ 5/3.3 | 13 |
| Reference output voltage | Vref | 1.25 | 1.26 | 1.27 | V | VCC=3V~5.5V, -40℃~+85℃ | 13 |
| Reference temperature coefficient | Tc |  | 5 | 15 | ppm/℃ | VCC=3V~5.5V, -40℃~+85℃ | 13 |
| CMP2 threshold | CMP2 | 1.1 | 1.22 | 1.35 | V | threshold for CMP2 output low result | 13 |
| LCD output voltage | LCDVD | 4.85 | 5.05 | 5.25 | V | full temperature range test | 13 |
| Internal high-frequency RC clock | RCH | 1.4 | 1.6 | 1.8 | MHz | default clock after reset | 13 |
| Internal low-frequency RC clock | RCL | 20 | 30 | 40 | KHz | used for WDT clock | 13 |
| CPU minimum operating voltage | Vil | 2.1 | 2.2 | 2.35 | V | room temperature | 13 |
| CPU minimum operating voltage (low temp) | Vil | 2 | 2.15 | 2.3 | V | -40 degrees | 13 |
| CPU minimum operating voltage (high temp) | Vil | 2.2 | 2.3 | 2.45 | V | 85 degrees | 13 |
| LDO33 output voltage | V33 | 3.2 | 3.3 | 3.4 | V |  | 13 |
| LDO18 output voltage | V1P8 | 1.62 | 1.8 | 1.98 | V |  | 14 |
| Supply voltage | Vvcc | -0.3 |  | 7 | V |  | 14 |
| DVDD to DGND | DVDD to DGND | -0.3 |  | 7 | V |  | 14 |
| DVDD to AVDD | DVDD to AVDD | -0.3 |  | 0.3 | V |  | 14 |
| Analog input voltage | V1P,V1N,V2P,V2N,V3P,V3N | -6 |  | 6 | V |  | 14 |
| Analog input voltage vs AGND | VINA | -0.3 |  |  | V | max printed as AVDD+0.3 | 14 |
| Operating temperature range | TA | -40 |  | 85 | ℃ |  | 14 |
| Storage temperature range | Tstg | -65 |  | 150 | ℃ |  | 14 |
| Digital IO Isource (6mA type) | Isource |  | 5 | 10 | mA | 6mA type | 14 |
| Digital IO Isink (6mA type) | Isink |  | 7 | 15 | mA | 6mA type | 14 |
| Digital IO Isource (3mA type) | Isource |  | 3 | 5 | mA | 3mA type | 14 |
| Digital IO Isink (3mA type) | Isink |  | 5 | 10 | mA | 3mA type | 14 |
| Analog current | AIdd |  | 2 |  | mA | all three ADCs on | 13 |
| Digital current | DIdd |  | 1.5 |  | mA | CPU at 3.6864MHz, metering on | 13 |
| Sleep current | SIdd |  | 10 |  | μA | RTC auto temp comp; RAM retained; WDT on; power monitor on; interrupt wake | 13 |

## CAD (KiCad official)

- Symbol: `RN7211`
- Footprint: `Package_QFP:LQFP-64_7x7mm_P0.4mm`
- 3D model: LQFP-64(7x7) (KiCad packages3D, STEP)
- 3D model files: `rn7211-etched.step` / `rn7211-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rn7211.step` / `rn7211.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [RENERGY datasheet](docs/rn7211-datasheet.pdf) (35 pp, sha256 `f278a4b6d65d33dc`, retrieved 2026-10-23, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/rn7211-datasheet.pdf)