Document
R8C/1A Group, R8C/1B Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
REJ03B0144-0140 Rev.1.40
Dec 08, 2006
1. Overview
These MCUs are fabricated using the high-performance silicon gate CMOS process, embedding the R8C/ Tiny Series CPU core, and is packaged in a 20-pin molded-plastic LSSOP, SDIP or a 28-pin plastic moldedHWQFN. It implements sophisticated instructions for a high level of instruction efficiency. With 1 Mbyte of address space, they are capable of executing instructions at high speed. Furthermore, the R8C/1B Group has on-chip data flash ROM (1 KB × 2 blocks). The difference between the R8C/1A Group and R8C/1B Group is only the presence or absence of data flash ROM. Their peripheral functions are the same.
1.1 Applications
Electric household appliances, office equipment, housing equipment (sensors, security systems), portable equipment, general industrial equipment, audio equipment, etc.
Rev.1.40 Dec 08, 2006 Page 1 of 45 REJ03B0144-0140
R8C/1A Group, R8C/1B Group
1. Overview
1.2 Performance Overview
Table 1.1 outlines the Functions and Specifications for R8C/1A Group and Table 1.2 outlines the Functions and Specifications for R8C/1B Group.
Table 1.1 Functions and Specifications for R8C/1A Group
CPU
Peripheral Functions
Item Number of fundamental instructions Minimum instruction execution time Operating mode Address space Memory capacity Ports
LED drive ports Timers
Serial interfaces
Clock synchronous serial interface
A/D converter Watchdog timer Interrupts Clock generation circuits
Electric Characteristics
Oscillation stop detection function Voltage detection circuit Power-on reset circuit Supply voltage
Current consumption
Flash Memory Programming and erasure voltage Programming and erasure endurance
Operating Ambient Temperature
Package
89 instructions
Specification
50 ns (f(XIN) = 20 MHz, VCC = 3.0 to 5.5 V) 100 ns (f(XIN) = 10 MHz, VCC = 2.7 to 5.5 V) Single-chip 1 Mbyte See Table 1.3 Product Information for R8C/1A Group I/O ports: 13 pins (including LED drive port) Input port: 3 pins I/O ports: 4 pins Timer X: 8 bits × 1 channel, timer Z: 8 bits × 1 channel (Each timer equipped with 8-bit prescaler) Timer C: 16 bits × 1 channel (Input capture and output compare circuits) 1 channel
Clock synchronous serial I/O, UART 1 channel
UART 1 channel
I2C bus Interface(1) Clock synchronous serial I/O with chip select (SSU) 10-bit A/D converter: 1 circuit, 4 channels 15 bits × 1 channel (with prescaler) Reset start selectable, count source protection mode Internal: 11 sources, External: 4 sources, Software: 4 sources, Priority levels: 7 levels 2 circuits • Main clock oscillation circuit (with on-chip feedback resistor) • On-chip oscillator (high speed, low speed) High-speed on-chip oscillator has a frequency adjustment function Main clock oscillation stop detection function On-chip On-chip VCC = 3.0 to 5.5 V (f(XIN) = 20 MHz) VCC = 2.7 to 5.5 V (f(XIN) = 10 MHz) Typ. 9 mA (VCC = 5.0 V, f(XIN) = 20 MHz, A/D converter stopped) Typ. 5 mA (VCC = 3.0 V, f(XIN) = 10 MHz, A/D converter stopped) Typ. 35 µA (VCC = 3.0 V, wait mode, peripheral clock off) Typ. 0.7 µA (VCC = 3.0 V, stop mode) VCC = 2.7 to 5.5 V 100 times
-20 to 85°C -40 to 85°C (D version) -20 to 105°C (Y version) (2) 20-pin molded-plastic LSSOP 20-pin molded-plastic SDIP 28-pin molded-plastic HWQFN
NOTE: 1. I2C bus is a trademark of Koninklijke Philips Electronics N. V. 2. Please contact Renesas Technology sales offices for the Y version.
Rev.1.40 Dec 08, 2006 Page 2 of 45 REJ03B0144-0140
R8C/1A Group, R8C/1B Group
1. Overview
Table 1.2 Functions and Specifications for R8C/1B Group
Item
Specification
CPU
Number of fundamental instructions
89 instructions
Minimum instruction execution time
50 ns (f(XIN) = 20 MHz, VCC = 3.0 to 5.5 V) 100 ns (f(XIN) = 10 MHz, VCC = 2.7 to 5.5 V)
Operating mode
Single-chip
Address space Memory capacity
1 Mbyte See Table 1.4 Product Information for R8C/1B Group
Peripheral Functions
Ports
I/O ports: 13 pins (including LED drive port) Input port: 3 pins
LED drive ports Timers
I/O ports: 4 pins Timer X: 8 bits × 1 channel, timer Z: 8 bits × 1 channel
(Each timer equipped with 8-bit prescaler) Timer C: 16 bits × 1 channel
(Input capture and output compare circuits)
Serial interfaces
1 channel Clock synchronous serial I/O, UART
1 channel UART
Clock synchronous serial interface 1 channel I2C bus Interface(1)
A/D converter
Clock synchronous serial I/O with chip select (SSU) 10-bit A/D converter: 1 circuit, 4 channels
Watchdog timer
15 bits × 1 channel (with prescaler) Reset start selectable, count source protection mode
Interrupts
Internal: 11 sources, External: 4 sources, Software: 4 sources,
Clock generation circuits
Priority levels: 7 levels 2 circuits
• Main clock generation circuit (with on-chip feedback resistor)
• On-chip oscillator (high speed, low speed) High-speed on-chip oscillator has a frequency adjustment
function Oscillation stop detectio.