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Renesas |
R8C/3GA Group
RENESAS MCU
REJ03B0235-0110
Rev.1.10
Sep. 10, 2009
1. Overview
1.1 Features
The R8C/3GA 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/3GA 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.
REJ03B0235-0110 Rev.1.10 Sep. 10, 2009
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R8C/3GA Group
1. Overview
1.1.2 Specifications
Tables 1.1 and 1.2 outline the Specifications for R8C/3GA Group.
Table 1.1 Specifications for R8C/3GA Group (1)
Item
CPU
Function
Central processing R8C CPU core
Specification
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, Data Refer to Table 1.3 Product List for R8C/3GA Group.
flash
Power Supply Voltage detection • Power-on reset
Voltage
circuit
• Voltage detection 3 (detection level of voltage detection 0 and voltage
Detection
I/O Ports
detection 1 selectable)
Programmable I/O • Input-only: 1 pin
Clock
ports
Clock generation
circuits
• CMOS I/O ports: 19, selectable pull-up resistor
• High current drive ports: 19
• 3 circuits: XIN clock oscillation circuit,
XCIN clock oscillation circuit (32 kHz),
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, low-speed on-
Interrupts
chip oscillator), wait mode, stop mode
Real-time clock (timer RE)
• Number of interrupt vectors: 69
• External Interrupt: 7 (INT × 3, Key input × 4)
• Priority levels: 7 levels
Watchdog Timer
• 14 bits × 1 (with prescaler)
• Reset start selectable
DTC (Data Transfer Controller)
• Low-speed on-chip oscillator for watchdog timer selectable
• 1 channel
Timer
Timer RA
• Activation sources: 23
• Transfer modes: 2 (normal mode, repeat mode)
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
Timer RB
measurement mode
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-
Timer RC
Timer RE
shot generation mode
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)
8 bits × 1
Real-time clock mode (count seconds, minutes, hours, days of week)
REJ03B0235-0110 Rev.1.10 Sep. 10, 2009
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