RL78/G1A
General-purpose microcontrollers with built-in high-resolution A/D converter, suitable for measurement devices and sensor applications
RL78/G1A microcontrollers balance the industry's lowest level of consumption current (CPU: 66 μA/MHz, standby (STOP): 230 nA) and a high performance of 41 DMIPS (32 MHz). A built-in high-resolution 12-bit A/D converter, on-chip oscillator, data flash, and safety features (function that detects illegal operation of hardware) enable support for the household appliance safety standard (IEC/UL 60730). With an lineup of 25 to 64-pin LGA/BGA and other small packages, these microcontrollers are perfect for consumer and industrial sensor applications.
Main Solutions
Key Features:
| ITEM | RL78/G1A | ||||
|---|---|---|---|---|---|
| Pin Count |
25-pin | 32-pin | 48-pin | 64-pin | |
| Program Flash | 16 to 64 KB | 16 to 64 KB | 16 to 64 KB | 32 to 64 KB | |
| Data Flash | 4 KB | ||||
| SRAM | 2 to 4 KB | ||||
| Power supply voltage | 1.6 to 3.6 V | ||||
| Operating ambient temperature | Ta = −40 to +85 °C (A Version : For Consumer applications) Ta = −40 to +105 °C (G version : For Industrial applications) |
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| Maximum operating Frequency | 32 MHz | ||||
| External Oscillator | 1 to 20 MHz: VDD = 2.7 to 3.6 V, 1 to 8 MHz: VDD = 1.8 to 2.7 V, 1 to 4 MHz: VDD = 1.6 to 1.8 V X1 (crystal/ceramic) oscillation, external main system clock input (EXCLK) |
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Internal high speedOn-Chip Oscillator |
High speed main mode : 1 to 32 MHz (VDD = 2.7 to 3.6V), 1 to 16 MHz (VDD = 2.4 to 3.6V) Low speed main mode : 1 to 8 MHz (VDD = 1.8 to 3.6V) Low voltage main mode : 1 to 4 MHz (VDD = 1.6 to 3.6V) |
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| Subsystem clock | - | XT1 (crystal) oscillation, external subsystem clock input (EXCLKS) 32.768 kHz (TYP.) | |||
| Low speed On-Chip Oscillator | 15 KHz (TYP.) | ||||
| Timer | 16-bit | 8 channels | |||
| Watchdog Timer | 1 channel | ||||
| Real-time Clock (RTC) | 1 channel | ||||
| 12-bit Interval timer | 1 channel | ||||
| Timer output | 2 channels (PWM output : 1) |
4 channels (PWM output : 3) |
7 channels (PWM output : 4) |
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| RTC output | - | 1 channel | |||
| Serial Interface | CSI 1 ch/ UART 1ch/ simplified IIC 1 ch | 2 units | 2 units | 1 unit | - |
| CSI 2 ch/ UART 1ch/ simplified IIC 2 ch | - | - | 1 unit | 2 units | |
| CSI 2 ch/ UART 1 ch (supporting LIN-Bus)/ simplified IIC 2ch | - | - | 1 unit | 1 unit | |
| CSI 1 ch/ UART 1 ch (supporting LIN-Bus)/ simplified IIC 1 ch | - | 1 unit | - | - | |
| IIC Bus | 1 channel | ||||
| 12-bit A/D Converter | 13 channels | 18 channels | 24 channels | 28 channels | |
| I/O Port | CMOS I/O | 14 (N-ch O.D. 6) | 20 (N-ch O.D. 9) | 32 (N-ch O.D. 11) | 46 (N-ch O.D. 12) |
| CMOS input | 3 | 5 | |||
| CMOS output | - | 1 | |||
| N-ch open-drain I/O (6 V tolerance) | 2 | 3 | 4 | ||
| Clock output/Buzzer output | 1 | 2 | 2 | ||
| DMA controller | 2 channels | ||||
| External vectored interrupt | 6 | 10 | 13 | ||
| Key interrupt | 0 ch (4 ch) *Note | 1 ch (6 ch) *Note | 6 | 10 | |
| On-chip debug function | Provided | ||||
*Note : Channel count by using Peripheral I/O Redirection Register (PIOR)
Pin Count / Memory Size Lineup:
Block Diagram:
Below you will find information to support the development of your application.
You can find an explanation of orderable part numbers here.
Resources for Software and Hardware
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|---|---|
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| FAQ | Frequently asked questions and useful hints for development. |
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Software Design Support
| Title | Description |
|---|---|
| CS+ | An integrated development environment that can be used for coding, assembling/compiling, and simulation. (Also included with Renesas Starter Kits.) |
| e2 studio | Renesas eclipse embedded studio, known as e² studio, is a complete development and debug environment based on the popular Eclipse CDT project. |
| E1 | A standard Renesas on-chip debugging emulator that enables users to carry out ample debugging for real development at low cost. (Also included with starter kits.) |
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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