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RL78/G1A

General-purpose microcontrollers with built-in high-resolution A/D converter, suitable for 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.

 

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)
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)

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)
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)
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:

RL78/G1A-Pin Count/Memory Size

 

Block Diagram:

RL78/G1A 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

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.
Video Watch videos related to this product.

 

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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