R5F21162SP#U0 Renesas Electronics America, R5F21162SP#U0 Datasheet - Page 36

• Manufacturer Part Number: R5F21162SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/16r

Specifications of R5F21162SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/16 Group, R8C/17 Group
Rev.2.10
REJ09B0169-0210
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 power
supply voltage meets the recommended performance condition, the pins, CPU and SFR are reset (refer
to Table 5.2 Pin Status after Reset). When the input level applied to the RESET pin changes “L” to “H”,
the program is executed beginning with the address indicated by the reset vector. After reset, the low-
speed on-chip oscillator clock divide-by-8 is automatically selected for the CPU clock.
Refer to 4. Special Function Register (SFR) for the status of the SFR after reset.
The internal RAM is not reset. If the RESET pin is pulled “L” during writing to the internal RAM, the
internal RAM will be in indeterminate state.
Figure 5.4 shows the Example of Hardware Reset Circuit and Operation and Figure 5.5 shows the
Example of Hardware Reset Circuit (Use Example of External Power Supply Voltage Detection Circuit)
and Operation.
Hardware Reset
(1) Apply an “L” signal to the RESET pin.
(2) Wait for 500µs (1/fRING-S×20).
(3) Apply an “H” signal to the RESET pin.
(1) Apply an “L” signal to the RESET pin.
(2) Let the power supply voltage increase until it meets the recommended performance condition.
(3) Wait for td(P-R) or more until the internal power supply stabilizes (Refer to 19. Electrical
(4) Wait for 500µs (1/fRING-S×20).
(5) Apply an “H” signal to the RESET pin.
Jan 19, 2006
When the power supply is stable
Power on
Characteristics).
Page 21 of 254
5. Reset