Renesas R8C/3NT Group Overview

Overview
The touch key microcontrollers (MCUs) of the R8C/3NT Group from Renesas Electronics are devices incorporating an electrostatic capacitive touch detector into the R8C/3x Series.

By integrating on a single chip a touch sensor IC for touch detection and a microcontroller for controlling the system based on the signals received, the R8C/3NT Group specifically meets the following five customer needs:

• More compact system size, and further smaller WPP package (3 mm × 3mm) for smaller devices
• System control via I/O ports
• Touch key connection via touch detection input pins (5-input)
• Reduced power consumption
• Improved noise tolerance

R8C/3NT Block Diagram

Click to enlarge

Specifications

• CPU core: R8C 16-bit CPU core
• Minimum instruction execution time: 50 nsec (f(Xin) = 20 MHz)
• Supply voltage: 2.7 to 5.5 V/Max. 20 MHz, 1.8 to 5.5 V/Max. 5 MHz
• DTC (Data transfer controller): 1 ch
• ROM/RAM: 48 KB/4 KB, 64 KB/6 KB, 96 KB/8 KB, 128 KB/10 KB (RAM: 0.5 KB for touch detection)
• Data flash: 1 KB × 4 blocks (Touch setting values can be stored.), with background operation (BGO) function
• Clock generation circuits: 4 circuits
  • XIN-XOUT main clock (oscillation stop detection circuit included)
  • XCIN-XCOUT sub clock
  • High-speed on-chip oscillator (40 MHz Typ.）
  • Low-speed on-chip oscillator (125 kHz Typ.)
• Voltage detection circuit (LVD): 3 circuits (detection levels selectable)
• Power-on reset (POR): Yes
• Watchdog timer: 1 ch (supports hardware reset)
• Multifunction timer: 3 ch
  • 8-bit timer 2 ch (Timer RA, Timer RB)
  • 16-bit timer 1 ch (Timer RC)
• Real-time clock timer: 1ch
  • 8-bit timer 1 ch
• Serial interface: 3 ch
  • Clock synchronous/UART0, UART1, UART2
• I2C/SSU: 4 circuits
• A/D converter: 10-bit x 12 ch
• Touch detector (SCU): 5-input (shared with I/O ports) (Reduces power consumption by allowing touch detection in wait mode.)
• I/O ports: Input/Output: 43, Input only: 1 (Large-current drive capacity is provided. Variable input threshold values: 3 values)
• Package: 48-pin WPP (3 mm × 3 mm)

Product Lineup:
R8C/3NT Group

Part No	ROM	RAM	Operating Frequency / Supply Voltage	Package
R5F213N7TNBX	48K + 4K	4K	20MHz/2.7 to 5.5V, 5MHz/1.8 to 5.5V	48-pin WPP
R5F213N8TNBX	64K + 4K	6K
R5F213NATNBX	96K + 4K	8K
R5F213NCTNBX	128K + 4K	10K

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