R5F21238DFP#U0 Renesas Electronics America, R5F21238DFP#U0 Datasheet - Page 134

• 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 12.14
Figure 12.15
12.2.2
INTi input
Sampling
timing
IR bit in
INTiIC register
The INTi input contains a digital filter. The sampling clock is selected by the INTiF1 to INTiF0 bits in the
INTF register. The IR bit in the INTiIC register is set to 1 (interrupt requested) when the INTi level is sampled
for every sampling clock and the sampled input level matches three times.
Figure 12.14 shows the Configuration of INTi Input Filter. Figure 12.15 shows Operating Example of INTi
Input Filter.
INTi Input Filter (i = 0 to 3)
Port direction
NOTE:
i = 0 to 3
Configuration of INTi Input Filter
Operating Example of INTi Input Filter
register
1. This is an operation example when the INTiF1 to INTiF0 bits in the
INTi
INTiF register is set to 01b, 10b, or 11b (passing digital filter).
(1)
i = 0 to 3
INTiF0, INTiF1: Bits in INTF register
INTiEN, INTiPL: Bits in INTEN register
NOTE:
f32
f1
f8
Page 112 of 501
1. INT0: Port P4_5 direction register
INTiF1 to INTiF0
INT1: Port P1_5 direction register when using P1_5 pin
INT2: Port P6_6 direction register
INT3: Port P6_7 direction register
= 01b
= 10b
= 11b
P1_7 direction register when using P1_7 pin
Sampling clock
matches 3x)
Digital filter
(input level
Other than
INTiF1 to INTiF0
= 00b
INTiEN
=00b
Both Edges
Detection
Set to 0 in program
Circuit
INTiPL = 0
INTiPL = 1
INTi interrupt
12. Interrupts