Americas
R8C/3NT
Overview
The touch key microcontrollers (MCUs) of the R8C/3NT Group 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 x 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
Specifications
| ・ | CPU core: R8C 16-bit CPU core | |
| ・ | Minimum instruction execution time: 50 nsec (f(Xin) = 20 MHz) |
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| ・ | Supply voltage: 2.7 to 5.5 V/Max. 20 MHz, 1.8 to 5.5 V/Max. 5 MHz |
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| ・ | 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) |
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| ・ | Data flash: 1 KB x 4 blocks (Touch setting values can be stored.), with background operation (BGO) function*1 | |
| ・ | DTC (Data transfer controller): 1 ch | |
| ・ | 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) |
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| ・ | Power-on reset (POR) circuit | |
| ・ | Watchdog timer: 1 ch (supports hardware reset, selectable low-speed on-chip oscillator for the watchdog timer) | |
| ・ | 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 (Timer RE) | |
| ・ | Serial interface: 3 ch | |
| - | Clock synchronous/UART0, UART1, UART2 | |
| ・ | I2C/SSU*2: 4 circuits | |
| ・ | A/D converter: 10-bit x 12 ch | |
| ・ | Touch detector (SCU)*3: 5-input (shared with I/O ports) (Reduces power consumption by allowing touch detection in wait mode.) |
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| ・ | I/O ports: Input/Output: 43, Input only: 1 (Large-current drive capacity is provided. Variable input threshold values: 3 values) |
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| ・ | Package: 48-pin WPP (3 mm x 3 mm) |
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Block Diagram
*1: A function to read the program ROM area during data flash programming or block erase operation.
*2: Synchronous serial communication unit
*3: Sensor control unit
Applications
e-Learning
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