R5F21122FP#U0 Renesas Electronics America, R5F21122FP#U0 Datasheet - Page 34

• Manufacturer Part Number: R5F21122FP#U0
• Description: IC R8C MCU FLASH 8K 32LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/12r

Specifications of R5F21122FP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SIO, UART/USART
• Peripherals: LED, WDT
• Number Of I /o: 22
• 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 8x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13R0E521134EPB00 - KIT EMULATOR PROBE FOR PC7501R0E521134CPE00 - EMULATOR COMPACT R8C/13
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/12 Group
Rev.1.20
REJ09B0110-0120
6.2 On-Chip Oscillator Clock
This clock, approximately 125 kHz, is supplied by a on-chip oscillator. This clock is used as the clock
source for the CPU clock, peripheral function clock, f
After reset, the on-chip oscillator clock divided by 8 is selected for the CPU clock.
To use the main clock for the CPU clock, set the OCD2 in the OCD register to “0” (selecting main
clock) after the main clock becomes oscillating stably. If the main clock stops oscillating when the
OCD1 to OCD0 bits in the OCD register is “11
chip oscillator automatically starts operating, supplying the necessary clock for the microcomputer.
The frequency of the on-chip oscillator varies depending on the supply voltage and the operation
ambient temperature. The application products must be designed with sufficient margin for the fre-
quency change.
Jan 27, 2006
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2
” (oscillation stop detection function enabled), the on-
RING
, and f
RING128
.
6.2 On-chip oscillator Clock