Datasheet
R8C/38C Group
R01DS0017EJ0110
Rev.1.10
RENESAS MCU
Nov 02, 2010
1. Overview
1.1 Features
The R8C/38C Group of single-chip MCUs incorporates the R8C CPU core, employing sophisticated instructions
for a high level of efficiency. With 1 Mbyte of address space, and it is capable of executing instructions at high
speed. In addition, the CPU core boasts a multiplier for high-speed operation processing.
Power consumption is low, and the supported operating modes allow additional power control. These MCUs are
designed to maximize EMI/EMS performance.
Integration of many peripheral functions, including multifunction timer and serial interface, reduces the number of
system components.
The R8C/38C Group has data flash (1 KB 4 blocks) with the background operation (BGO) function.
1.1.1 Applications
Electronic household appliances, office equipment, audio equipment, consumer equipment, etc.
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Nov 02, 2010R8C/38C Group 1. Overview
1.1.2 Specifications
Tables 1.1 and 1.2 outline the Specifications for R8C/38C Group.
Table 1.1 Specifications for R8C/38C Group (1)
Item Function Specification
CPU Central processing R8C CPU core
unit 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, Refer to Table 1.3 Product List for R8C/38C Group
Data flash
Power Supply Voltage detection Power-on reset
Voltage circuit Voltage detection 3 (detection level of voltage detection 0 and voltage
Detection detection 1 selectable)
I/O Ports Programmable I/O Input-only: 1 pin
ports CMOS I/O ports: 75, selectable pull-up resistor
High current drive ports: 75
Clock Clock generation 4 circuits: XIN clock oscillation circuit,
circuits 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: Dividing selectable 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
Real-time clock (timer RE)
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: 39
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)
Timer RD 16 bits 2 (with 4 capture/compare registers)
Timer mode (input capture function, output compare function), PWM mode
(output 6 pins), reset synchronous PWM mode (output three-phase
waveforms (6 pins), sawtooth wave modulation), complementary PWM mode
(output three-phase waveforms (6 pins), triangular wave modulation), PWM3
mode (PWM output 2 pins with fixed period)
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Nov 02, 2010