R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 196

• Manufacturer Part Number: R5F21238DFP#U0
• Description: IC R8C/23 MCU FLASH 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/23r

Specifications of R5F21238DFP#U0

• Core Size: 16/32-Bit
• Program Memory Size: 64KB (64K x 8)
• Peripherals: POR, Voltage Detect, WDT
• Core Processor: R8C
• Speed: 20MHz
• Connectivity: CAN, I²C, LIN, SIO, SSU, UART/USART
• Number Of I /o: 41
• Program Memory Type: FLASH
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• No. Of I/o's: 41
• Ram Memory Size: 3KB
• Cpu Speed: 20MHz
• No. Of Timers: 4
• Digital Ic Case Style: LQFP
• Embedded Interface Type: CAN, I2C, UART
• Rohs Compliant: Yes
• Cpu Family: R8C
• Device Core Size: 16b
• Frequency (max): 20MHz
• Interface Type: I2C/UART
• Total Internal Ram Size: 3KB
• # I/os (max): 41
• Number Of Timers - General Purpose: 5
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 3V
• On-chip Adc: 12-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Package Type: LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: RCDK8C - KIT DEV EVAL FOR CAN R8C/23R0K521237S000BE - KIT DEV RSK R8C/23R0E521237CPE00 - EMULATOR COMPACT R8C/20/21/22/23
• Eeprom Size: -
• Lead Free Status / Rohs Status: Compliant

R8C/22 Group, R8C/23 Group
Rev.2.00 Aug 20, 2008
REJ09B0251-0200
Figure 14.28
14.3.1
Table 14.21
i = 0 or 1
NOTE:
f1, f2, f4, f8, f32
fOCO40M
External Signal Input
to TRDCLK Pin
1. The count source fOCO40M can be used with VCC = 3.0 to 5.5 V.
Count Source
TRDCLK/
TRDIOA0
The count source selection can be used in all modes. However, in PWM3 mode, the external clock cannot be
selected.
Set the pulse width of the external clock which inputs to the TRDCLK pin to 3 cycles or above of the operation
clock of Timer RD (refer to Table 14.11 Timer RD Operation Clocks).
When selecting fOCO40M for the count source, set the FRA00 bit in the FRA0 register to 1 (high-speed on-
chip oscillator on) before setting the TCK2 to TCK0 bits in the TRDCRi register (i = 0 or 1) to 110b
(fOCO40M).
fOCO40M
Count Source
(1)
f32
f1
f2
f4
f8
Count Source Selection
Block Diagram of Count Source
i = 0 or 1
TCK2 to TCK0, CKEG1 to CKEG0: Bits in TRDCRi register
STCLK: Bit in TRDFCR register
STCLK = 1
STCLK = 0
Page 174 of 501
The count source is selected by bits TCK2 to TCK0 in the TRDCRi register.
The FRA00 bit in the FRA0 register is set to 1 (high-speed on-chip oscillator
frequency).
Bits TCK2 to TCK0 in the TRDCRi register is set to 110b (fOCO40M).
The STCLK bit in the TRDFCR register is set to 1 (external clock input enabled).
The TCK2 to TCK0 bits in the TRDCRi register are set to 101b
(count source: external clock).
The valid edge selected by the CKEG1 to CKEG0 bits in the TRDCRi register.
The PD2_0 bit in the PD2 register is set to 0 (input mode).
CKEG1 to CKEG0
Valid edge
selected
= 011b
= 010b
= 100b
= 110b
= 001b
TCK2 to TCK0
TRDIOA0 I/O or programmable I/O port
= 000b
= 101b
Selection
Count source
TRDi register
14. Timers