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RL78/G1A

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The following page content corresponds to the products marketed in Japan.
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Product Overview:

RL78/G1A Group microcontrollers employ the RL78 core which realizes high processing performance while delivering the lowest power consumption in their class, and have an enhanced A/D conversion circuit.
In addition to a high-precision (±1%) on-chip oscillator enabling 32 MHz CPU operation and other standard on-chip functions from the RL78/G13, the RL78/G1A microcontrollers have a built-in A/D conversion circuit with 12-bit precision accuracy enabling fine-grained control and support up to 28 channels of analog input, allowing them to be used for a wide range of system control applications, for example sensor systems.
In addition, abundant functions for supporting functional safety, such as an A/D converter testing function, are also on-chip.
With ultra-small packages such as 25-pin LGA (3 x 3 mm) and 64-pin BGA (4 x 4 mm) ideal for compact devices, these products are suitable for devices having a sensor, such as industrial equipment, office equipment, and home appliances, mobile devices, healthcare devices, and other consumer electronics.

Pin Count / Memory Size Lineup:

map_rl78g1a

Block Diagram:

Block Diagram image

Key Features:

25-pin 32-pin 48-pin 64-pin
Code Flash 16 to 64 KB 16 to 64 KB 16 to 64 KB 32 to 64 KB
Data Flash 4 KB
RAM 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 speed On-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 No 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 No 1 channel
Serial Interface CSI 1 ch/ UART 1ch/ simplified IIC 1 ch 2 units 2 units 1 unit No
CSI 2 ch/ UART 1ch/ simplified IIC 2 ch No No 1 unit 2 units
CSI 2 ch/ UART 1 ch (supporting LIN-Bus)/ simplified IIC 2ch No No 1 unit 1 unit
CSI 1 ch/ UART 1 ch (supporting LIN-Bus)/ simplified IIC 1 ch No 1 unit No No
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 No 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)

Key Applications:

  • Consumer Electronics, Industrial

Product Lineup:


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