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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Block Diagram:
| Title | Description |
|---|---|
| My Renesas | Create a My Renesas account to use our tool download services, receive e-newsletter/update notifications, and take advantage of our other services. |
| e-learning | Information for studying and learning about microcontrollers and microprocessors. |
| FAQ | Frequently asked questions and useful hints for development. |
| Forum | A forum and community site to share technical information, questions and opinions with others who use Renesas products. |
Software Design Support
| Title | Description |
|---|---|
| e² studio | This integrated development environment (IDE) is based on the popular combination of the open-source Eclipse IDE and its CDT plug-in that enables C/C++ language development. |
| CS+ | This integrated development environment (IDE) can be used for coding, assembly, compiling, and simulation. CS+ is also included with starter kits. |
| E2 emulator Lite | This entry-level on-chip debugging emulator provides functionality equivalent to that of the E1 emulator at a low price. |
| E2 emulator | This on-chip debugging emulator has advanced features that improve the efficiency of development. In addition to the basic functions from debugging to flash programming, this emulator supports hot plug-in and external triggers as standard items. This emulator also helps to reduce development time by downloading at high speeds (compared to the E1 emulator) and the ability to work in combination with various solutions such as the tuning of current drawn by systems under development. |
| E1 emulator | This on-chip debugging emulator is a standard model which provides basic debugging functions (production is to be discontinued at the end of December 2019). |
Hardware Design Support
| Title | Description |
|---|---|
| IBIS | IBIS standard simulation data is required for high-speed board design and can be used to run simulations to examine and troubleshoot issues such as waveform reflection, ringing, and so on, before producing the actual board. |
| 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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