R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 137

• Manufacturer Part Number: R5F21334CNFP#U0
• Description: MCU 1KB FLASH 16K ROM 32-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/33Cr

Specifications of R5F21334CNFP#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: 27
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 107 of 589
9.2.8
9.2.9
After Reset
After Reset
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 0025h
Address 0028h
Set the PRC0 bit in the PRCR register to 1 (write enabled) before rewriting the FRA2 register.
Symbol
Symbol
Symbol
Symbol
FRA20 High-speed on-chip oscillator frequency
FRA21
FRA22
CPSR
Bit
Bit
High-Speed On-Chip Oscillator Control Register 2 (FRA2)
Clock Prescaler Reset Flag (CPSRF)
—
—
—
—
—
—
—
—
—
—
—
—
CPSR
b7
b7
—
0
0
switching bit
Reserved bits
Reserved bits
Clock prescaler reset flag
b6
b6
—
—
0
0
Bit Name
Bit Name
b5
—
b5
—
0
0
b4
b4
—
—
0
0
Set to 0.
Setting this bit to 1 initializes the clock prescaler.
(When read, the content is 0.)
b3
b3
—
—
0
0
Division selection
These bits select the division ratio for the high-
speed on-chip oscillator clock.
b2 b1 b0
Set to 0.
0 0 0: Divide-by-2 mode
0 0 1: Divide-by-3 mode
0 1 0: Divide-by-4 mode
0 1 1: Divide-by-5 mode
1 0 0: Divide-by-6 mode
1 0 1: Divide-by-7 mode
1 1 0: Divide-by-8 mode
1 1 1: Divide-by-9 mode
FRA22
b2
b2
—
0
0
Function
FRA21
Function
b1
b1
—
0
0
9. Clock Generation Circuit
FRA20
b0
b0
—
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W