| Series | RX21A |
| Package | Tray |
| Part Status | Active |
| Core Processor | RX |
| Core Size | 32-Bit |
| Speed | 50MHz |
| Connectivity | I²C, IrDA, SCI, SPI |
| Peripherals | DMA, LVD, POR, PWM, WDT |
| Number of I/O | 51 |
| Program Memory Size | 384KB (384K x 8) |
| Program Memory Type | FLASH |
| EEPROM Size | 8K x 8 |
| RAM Size | 64K x 8 |
| Voltage - Supply (Vcc/Vdd) | 2.7V ~ 3.6V |
| Data Converters | A/D 4x10b, 7x24b Sigma-Delta; D/A 2x10b |
| Oscillator Type | Internal |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | 80-LQFP |
| Supplier Device Package | 80-LQFP (12x12) |
