R5F21236KFP#U0 Renesas Electronics America, R5F21236KFP#U0 Datasheet - Page 93

• Manufacturer Part Number: R5F21236KFP#U0
• Description: IC R8C/23 MCU FLASH 48LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/23r

Specifications of R5F21236KFP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: CAN, I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-LQFP
• For Use With: RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
10. Clock Generation Circuit
The clock generation circuit has:
Table 10.1 lists Specifications of Clock Generation Circuit. Figure 10.1 shows a Clock Generation Circuit. Figures
10.2 to 10.8 show clock-associated registers.
Table 10.1
NOTES:
Use of Clock
Clock Frequency 0 to 20 MHz
Connectable
Oscillator
Oscillator
Connect Pins
Oscillation Stop,
Restart Function
Oscillator Status
After Reset
Others
• XIN clock oscillation circuit
• Low-speed on-chip oscillator
• High-speed on-chip oscillator
1. These pins can be used as P4_6 and P4_7 when using the on-chip oscillator clock as the CPU
2. Set the CM05 bit in the CM0 register to 1 (main clock stops) and the CM13 bit in the CM1 register to
3. The clock frequency is automatically set to up to 20 MHz by a driver when using the high-speed on-
clock while the XIN clock oscillation circuit is not used.
1 (XIN-XOUT pin) when the external clock is input.
chip oscillator as the CPU clock source.
Item
Specifications of Clock Generation Circuit
• CPU clock source
• Peripheral
• Ceramic
• Crystal oscillator
XIN, XOUT
Usable
Stop
Externally
generated clock
can be input
Oscillation Circuit
function clock
source
resonator
Page 71 of 501
XIN Clock
(1)
(2)
• CPU clock source
• Peripheral function clock
• CPU and peripheral function
Approx. 40 MHz
−
−
Usable
Stop
−
High-Speed On-Chip Oscillator
source
clock sources when XIN clock
stops oscillating
(1)
(3)
On-Chip Oscillator
• CPU clock source
• Peripheral function clock
• CPU and peripheral function
Approx. 125 kHz
−
−
Usable
Oscillate
−
Low-Speed On-Chip Oscillator
source
clock sources when XIN clock
stops oscillating
(1)
10. Clock Generation Circuit