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RL78/I1A

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

RL78/I1A Group microcontrollers employ the RL78 core which realizes high processing performance while delivering the lowest power consumption in their class, and realize LED control, power supply control, and communication functions on a single chip.
In addition to a high-precision (±1%) on-chip oscillator enabling 24 MHz CPU operation and other standard on-chip functions from the RL78/G13, 64 MHz timer operation and a dithering function makes PWM output of a minimum of 0.98 ns resolution possible, enabling fine-grained dimming and color toning control.
In addition, PFC control and protection functions can be implemented by hardware by linking the PWM timer with a comparator or external interrupt input.
A PGA (programmable gain amplifier) that can amplify the A/D converter input level by up to a factor of 32 supports high-precision LED current measurement. This enables finer-grained dimming and toning control and allows a smaller current measurement resistor to be used, thus contributing to reduced overall system power consumption.
For Lighting applications DALI and DMX512 interface are supported.
For power control applications PMBus and SMBus are supported.
With a 20 to 38-pin lineup, these products are suitable for LED lighting and power supply control.

Pin Count / Memory Size Lineup:

map_rl78i1a

Block Diagram:

Block Diagram image

Key Features:

20-pin (R5F1076xxxSP) 30-pin (R5F107AxxxSP) 38-pin (R5F107DxxxSP)
I/O Port Total 16 26 34
CMOS I/O 13 23 29
CMOS input 3 3 5
Timer 16-bit timer (TAU) 8 channels (no timer output) 8 channels (timer output: 1, PWM output: 1) 8 channels (timer outputs: 3, PWM outputs 3)
16-bit timer (KB) 2 channels (PWM outputs: 4) 3 channels (PWM outputs: 6)
16-bit timer (KC) 1 channel (PWM outputs: 3) 1 channel (PWM outputs: 6)
Real time clock (RTC) 1 channel (no output) 1 channel (1 output)
8/10-bit A/D converter 6 channels 11 channels
Comparator 4 channels 6 channels
Programmable gain amplifier 1 channel (Input: 4 channels) 1 channel (Input: 6 channels)
Serial interface UART (Supporting LIN-bus and DMX512) 1 channel
UART (Supporting DALI communication) 1 channel
UART No 1 channel No
CSI/UART (Supporting LIN-bus and DMX512): No No 1 channel
Vectored interrupt sources 7 external / 27 internal 10 external / 30 internal 11 external / 30 internal
Operating ambient temperature -40 to +105 ℃ (R5F107xxxGSP) / -40 to +125 ℃ (R5F107xxxMSP)

Key Applications:

Product Lineup:


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