Document
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 Page 1 of 53
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 × .