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R8C/3MU

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Table 1. Specifications for R8C/3MU 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)
    200 ns (f(XIN) = 5 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: 30, selectable pull-up resistor
  • High current drive ports: 30
Clock Clock generation circuits
  • 4 circuits:
    XIN clock oscillation circuit,
    High-speed On-chip oscillator (with frequency adjustment function),
    Low-speed On-chip oscillator
    PLL frequency synthesizer
  • Oscillation stop detection: XIN clock oscillation stop detection function
  • Frequency divider circuit: Dividing selectable 1, 2, 4, 8, and 16
  • Low power consumption modes:
    Standard operating mode (XIN clock, PLL frequency synthesizer, high-speed on-chip oscillator, low-speed on-chip oscillator), wait mode, stop mode
Interrupts
  • Interrupt Vectors: 69
  • External: 9 sources (INT × 5, key input × 4)
  • Priority levels: 7 levels
Watchdog Timer
  • 14 bits × 1 (with prescaler)
  • Reset start selectable
  • Low-speed on-chip oscillator for watchdog timer selectable
DTC (Data Transfer Controller)
  • 1 channel
  • Activation sources: 25
  • Transfer modes: 2 (normal mode, repeat mode)
Timer Timer RA
8 bits × 1 (with 8-bit prescaler)
Timer mode (period timer), pulse output mode (output level inverted every period), event counter mode, pulse width measurement mode, pulse period measurement mode
Timer RB
8 bits × 1 (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 pin)
Serial Interface UART0, UART1,
UART3
Clock synchronous serial I/O/UART × 3 channels
UART2 Clock synchronous serial I/O, UART, multiprocessor communication function
Synchronous Serial Communication Unit (SSU) 1 (shared with I2C bus)
I2C bus 1 (shared with SSU)
LIN ModuleHardware LIN: 1 (timer RA, UART0)
USB Functions
  • USB 2.0 specification compliant, Full speed (12 Mbps) supported
  • USB function controller and USB transceiver incorporated
  • 5 pipes provided with individual FIFO
    Arbitrary EP numbers can be specified for PIPE4 to 7
  • FIFO size (total 448 bytes):
    DCP (EP0) = 64 bytes,
    PIPE4 and PIPE5 = 128 bytes (64-byte double buffer),
    PIPE6 and PIPE7 = 64 bytes
  • Supported transfer:
    DCP = Control transfer IN/OUT,
    PIPE4 and PIPE5 = Bulk transfer IN/OUT,
    PIPE6 and PIPE7 = Interrupt transfer IN/OUT
Comparator B 2 circuits
Flash Memory
  • Programming and erasure voltage: VCC=2.7 to 5.5 V
  • Programming and erasure endurance:
    10,000 times (data flash), 1,000 times (program ROM)
  • Program security: ROM code protect, ID code check
  • Debug functions: On-chip debug, on-board flash rewrite function
  • Background operation (BGO) function
Operating Frequency/
Supply Voltage
f(XIN) = 20 MHz (VCC = 2.7 to 5.5 V) (USB not used)
f(XIN) = 5 MHz (VCC = 1.8 to 5.5 V) (USB not used)
Current Consumption Typ. 7.0 mA (VCC = 5.0 V, f(XIN) = 20 MHz)
Typ. 3.5 mA (VCC = 3.0 V, f(XIN) = 10 MHz)
Typ. 4.0 µA (VCC = 3.0 V, wait mode)
Typ. 2.0 µA (VCC = 3.0 V, stop mode)
Operating Ambient Temperature -20 to 85 degrees C (N version)
Package
40-pin QFN
Package code: PWQN0040KB-B (previous code: 40PJS-B)

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