R8C/LA3A

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Microcontrollers (MCU) and Microprocessors (MPU)

R8C Family

R8C/Lx

Product Specifications
Characteristics
Oscillation Parameters

Table 1. Specifications for R8C/LA3A Group

Item	Function	Specification
CPU	Central processing unit	R8C CPU core Number of fundamental instructions: 89 Minimum instruction execution time: 50 ns (f(XIN) = 20 MHz, VCC = 2.7 to 5.5 V) 125 ns (f(XIN) = 8 MHz, VCC =1.8 to 5.5 V) Multiplier: 16 bits × 16 bits → 32 bits Multiply-accumulate instruction: 16 bits × 16 bits + 32 bits → 32 bits Operation mode: Single-chip mode (address space: 1 Mbyte)
Memory	ROM, RAM, Data Flash	See Product Lineup.
Power Supply Voltage Detection	Voltage detection circuit	Power-on reset Voltage detection 3 (detection level of voltage detection 0 and voltage detection 1 selectable)
I/O Ports	Programmable I/O ports	CMOS I/O ports: 26, selectable pull-up resistor⁽¹⁾ High current drive ports: 8
Clock	Clock generation circuits	4 circuits: XIN clock oscillation circuit XCIN clock oscillation circuit (32 kHz) High-speed On-chip oscillator (with frequency adjustment function) Low-speed on-chip oscillator Oscillation stop detection: XIN clock oscillation stop detection function Frequency divider circuit: Division ratio selectable from 1, 2, 4, 8, and 16 Low power consumption modes: Standard operating mode (high-speed clock, low-speed clock, high-speed on-chip oscillator, low-speed on-chip oscillator), wait mode, stop mode, power-off mode
Clock		Real-time clock (timer RH)
Interrupts		Number of interrupt vectors: 69 External interrupt: 13 (INT × 5, Key input × 8) Priority levels: 7 levels
Watchdog Timer		14 bits × 1 (with prescaler) Selectable reset start function Selectable low-speed on-chip oscillator for watchdog timer
Timer
	Timer RB0, Timer RB1	8 bits × 2 (with 8-bit prescaler) Timer mode (period timer), programmable waveform generation mode (PWM output), programmable one-shot generation mode, programmable wait one-shot generation mode
	Timer RC	16 bits × 1 (with 4 capture/compare registers) Timer mode (input capture function, output compare function), PWM mode (output: 3 pins), PWM2 mode (PWM output: 1 pin)
	Timer RH	Real-time clock mode (counting of seconds, minutes, hours, day of the week, date, month, year), output compare mode
	Timer RJ0, Timer RJ1	16 bits × 2 (Timer RJ0 and Timer RJ1) Timer mode (period timer), pulse output mode (output level inverted every period), event counter mode, pulse width measurement mode, pulse period measurement mode
Serial Interface	UART0	1 channel Clock synchronous serial I/O/UART
Synchronous Serial Communication Unit (SSU)		1 (shared with I²C-bus)
I²C-bus		1 (shared with SSU)
A/D Converter		10-bit resolution × 5 channels, including sample and hold function, with sweep mode, temperature sensor included (measurement temperature range: -20 degrees C to 85 degrees C (N version)/-40 degrees C to 85 degrees C (D version))
Comparator B		1 circuit (comparator B1)
LCD Drive Control Circuit		Bias: 1/2, 1/3 Duty: static, 1/2, 1/3, 1/4 Common output: Max. 4 pins Segment output: Max. 11 pins
Flash Memory		Programming and erasure voltage: VCC = 1.8 to 5.5V (data flash VCC = 1.8 to 5.5 V) Programming and erasure endurance: 10,000 times (data flash), 10,000 times (program ROM) Program security: ROM code protect, ID code check On-chip debug function On-board flash rewrite function
Operating Frequency/ Supply Voltage		f(XIN) = 20 MHz (VCC = 2.7 to 5.5 V) f(XIN) = 8 MHz (VCC = 1.8 to 5.5 V)
Current Consumption		Typ. 4.7 mA (VCC = 5.0 V, f(XIN) = 20 MHz) Typ. 2.3 mA (VCC = 3.0 V, f(XIN) = 10 MHz) Typ. 1.7 µA (VCC = 3.0 V, wait mode (f(XCIN) = 32 kHz)) Typ. 0.5 µA (VCC = 3.0 V, stop mode) Typ. 1.3 µA (VCC = 3.0 V, power-off 2 mode , timer RH enabled) Typ. 0.01 µA (VCC = 3.0 V, power-off 0 mode, timer RH disabled)
Operating Ambient Temperature		-20 to 85 degrees C (N version) -40 to 85 degrees C (D version)⁽²⁾

Note:

No pull-up resistor is provided in the pins P5_4 to P5_6.
Specify the D version if D version functions are to be used.