R5F212A8SNFA#U0 Renesas Electronics America, R5F212A8SNFA#U0 Datasheet - Page 59

• Manufacturer Part Number: R5F212A8SNFA#U0
• Description: IC R8C/2A MCU FLASH 64K 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/2Ar

Specifications of R5F212A8SNFA#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, PWM, Voltage Detect, WDT
• Number Of I /o: 55
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 64-LQFP
• For Use With: R0K5212D8S001BE - KIT STARTER FOR R8C/2DR0K5212D8S000BE - KIT DEV FOR R8C/2D
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/2A Group, R8C/2B Group
Rev.2.00
REJ09B0324-0200
5.1
5.1.1
5.1.2
A reset is applied using the RESET pin. When an “L” signal is applied to the RESET pin while the supply voltage
meets the recommended operating conditions, pins, CPU, and SFRs are all reset (refer to Table 5.2 Pin Functions
while RESET Pin Level is “L”). When the input level applied to the RESET pin changes from “L” to “H”, a
program is executed beginning with the address indicated by the reset vector. After reset, the low-speed on-chip
oscillator clock divided by 8 is automatically selected as the CPU clock.
Refer to 4. Special Function Registers (SFRs) for the state of the SFRs after reset.
The internal RAM is not reset. If the RESET pin is pulled “L” while writing to the internal RAM is in progress, the
contents of internal RAM will be undefined.
Figure 5.5 shows an Example of Hardware Reset Circuit and Operation and Figure 5.6 shows an Example of
Hardware Reset Circuit (Usage Example of External Supply Voltage Detection Circuit) and Operation.
Hardware Reset
(1) Apply “L” to the RESET pin.
(2) Wait for 10 µs or more.
(3) Apply “H” to the RESET pin.
(1) Apply “L” to the RESET pin.
(2) Let the supply voltage increase until it meets the recommended operating conditions.
(3) Wait for td(P-R) or more to allow the internal power supply to stabilize (refer to 21. Electrical
(4) Wait for 10 µs or more.
(5) Apply “H” to the RESET pin.
Nov 26, 2007
When Power Supply is Stable
Power On
Characteristics).
Page 37 of 580
5. Resets