Multifunctional microcontrollers with enhanced functionality suitable for sensorless BLDC motor control
RL78/G1F microcontrollers are functionally upward-compatible with the RL78/G14 microcontrollers and have enhanced analog functionality. They are equipped with a built-in high slew rate PGA (3.0 V/μs or higher*), high-speed (0.07 μs (typ.) reaction time) multifunction comparator, and A/D and D/A converters. When RL78/G1F microcontrollers control sensorless BLDC motors, by using these analog functions and two timers capable of operating at 64 MHz, efficient initial rotor position detection and high-speed rotation using 120-degree conducting control can be achieved. They can also perform high-speed overcurrent detection and output cutoff without CPU intervention, so highly flexible motor control can be realized with a small number of parts. Other available features include IrDA communication functions and 4 mm2 36-pin LGA packages that can support low-voltage interfaces, so RL78/G1F microcontrollers can be used not only for motor control but for a variety of applications.
(＊)VDD≧4V
RL78/G1F Sensorless BLDC motor initial rotor position detection demo >> White Paper >>
High-performance, brushless DC motor control using a low-end microcontroller >>
Main Solutions
Key Features:
| ITEM | Rl78/G1F | |||||
|---|---|---|---|---|---|---|
| Pin Count | 24-pin | 32-pin | 36-pin | 48-pin | 64-pin | |
| Part Name | R5F11B7C R5F11B7E |
R5F11BBC R5F11BBE |
R5F11BCC R5F11BCE |
R5F11BGC R5F11BGE |
R5F11BLC R5F11BLE |
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| Program Flash | 32 to 64 KB | |||||
| Data Flash | 4 KB | |||||
| SRAM | 5.5 KB | |||||
| Main System Clock | High-speed system clock (fMX) |
X1 (crystal/ceramic) oscillation, external main system clock input (EXCLK) HS (high-speed main) mode: 1 to 20 MHz (VDD = 2.7 to 5.5 V), HS (high-speed main) mode: 1 to 16 MHz (VDD = 2.4 to 5.5 V), LS (low-speed main) mode: 1 to 8 MHz (VDD = 1.8 to 2.7 V), LV (low-voltage main) mode: 1 to 4 MHz (VDD = 1.6 to 1.8 V) |
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| High-speed on-chip oscillator clock (fIH) |
HS (high-speed main) mode: 1 to 32 MHz (VDD = 2.7 to 5.5 V), HS (high-speed main) mode: 1 to 16 MHz (VDD = 2.4 to 5.5 V), LS (low-speed main) mode: 1 to 8 MHz (VDD = 1.8 to 5.5 V), LV (low-voltage main) mode: 1 to 4 MHz (VDD = 1.6 to 5.5 V) * Only Timer RD and Timer RX can be operated at 48, 64 MHz(fHOCO) |
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| SubSystem Clock | - | XT1 (crystal) oscillation, external subsystem clock input (EXCLKS) 32.768 kHz |
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| Low-speed on-chip oscillator clock | 15 kHz (TYP.): VDD = 1.6 to 5.5 V | |||||
| I/O Port | Total | 20 | 28 | 31 | 44 | 58 |
| CMOS I/O | 17 | 25 | 24 | 34 | 48 | |
| CMOS input | 3 | 3 | 5 | 5 | 5 | |
| CMOS output | - | - | - | 1 | 1 | |
| N-ch open drain I/O | - | - | 2 | 4 | 4 | |
| Timer | 16-bit timer | 9 channels: TAU: 4 channels (3x PWM output), Timer RJ: 1 channel (16bit timer), Timer RD: 2 channels (with PWMOPA to support 1ph to 3ph Motor control outputs with deadtime), Timer RX: 1 channel (for rotor position detection), Timer RG: 1 channel (16bit, PWM output, with encoder function) |
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| Watchdog timer | 1 channel | |||||
| Real-time clock | 1 channel | |||||
| 12-bit interval timer | 1 channel | |||||
| Timer output | Timer outputs: 13 channels PWM outputs: 8 channels | Timer outputs: 16 channels PWM outputs: 9 channels | ||||
| RTC output | - | 1 (1 Hz (subsystem clock: fSUB = 32.768 kHz)) | ||||
| Clock output/buzzer output | 2 (2.44 kHz, 4.88 kHz, 9.77 kHz, 1.25 MHz, 2.5 MHz, 5 MHz, 10 MHz (Main system clock : fMAIN = 20 MHz operation)) | |||||
| 8/10-bit resolution A/D converter | 8 channels | 13 channels | 15 channels | 17 channels | 17 channels | |
| 8-bit D/A converter | 1 channel | 2 channels | ||||
| Comparators | 2 channels | |||||
| PGA | 1 channel | |||||
| Serial interfaces | [24-pin, 32-pin, 36-pin products] - CSI: 1 channel/UART (supporting LIN-bus): 1 channel/simplified I2C: 1 channel - CSI: 1 channel/UART: 1 channel/simplified I2C: 1 channel - CSI: 1 channel/UART (supporting IrDA): 1 channel/simplified I2C: 1 channel [48-pin products] - CSI: 2 channels/UART (supporting LIN-bus): 1 channel/simplified I2C:2 channels - CSI: 1 channel/UART: 1 channel/simplified I2C: 1 channel - CSI: 2 channels/UART (supporting IrDA): 1 channel/simplified I2C: 2 channels [64-pin products] - CSI: 2 channels/UART (supporting LIN-bus): 1 channel/simplified I2C: 2 channels - CSI: 2 channels/UART: 1 channel/simplified I2C: 2 channels - CSI: 2 channels/UART (supporting IrDA): 1 channel/simplified I2C: 2 channels |
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| I2C-Bus | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel | |
| Data transfer controller (DTC) | 30 sources | 32 sources | 31 sources | 32 sources | 33 sources | |
| Event link controller (ELC) | Event input | 21 | 21 | 21 | 22 | 22 |
| Event trigger output | 9 | 10 | 10 | 10 | 10 | |
| External interrupt external | 9 | 11 | 10 | 16 | 20 | |
| Power-on-reset circuit | Power-on-reset: 1.51 V / Power-down-reset: 1.50 V | |||||
| Voltage detector | [TA = -40 to +85°C] 1.63 V to 4.06 (14 stages) [TA = -40 to +105°C (G: Industrial applications)] 2.60 to 4.22 (8 stages) / 2.54 to 4.13 V (8 stages) |
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| On-chip debug function | Supported (with trace function) | |||||
| Power supply voltage | VDD = 1.6 to 5.5 V (TA = -40 to +85°C) VDD = 2.4 to 5.5 V (TA = -40 to +105°C) |
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| Operating ambient temperature | TA = -40 to +85°C (A: Consumer applications), TA = -40 to +105°C (G: Industrial applications) |
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Software Design Support
| Title | Description |
|---|---|
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Hardware Design Support
| Title | Description |
|---|---|
| Characteristics data | Information on observed values. Please use this as reference data when developing your set. |
| Oscillation circuit characteristics | The resonators for which the operation is verified and their oscillator constants are shown below. |
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