R5F21162SP#U0 Renesas Electronics America, R5F21162SP#U0 Datasheet - Page 85

• Manufacturer Part Number: R5F21162SP#U0
• Description: IC R8C MCU FLASH 8K 20SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/16r

Specifications of R5F21162SP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, SIO, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• 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 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• For Use With: R0K521134S000BE - KIT EVAL STARTER FOR R8C/13
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/16 Group, R8C/17 Group
Rev.2.10
REJ09B0169-0210
Figure 11.12
Figure 11.13
11.2.2
INT0 Input
Sampling
Timing
IR Bit in
INT0IC Register
The INT0 input contains a digital filter. The sampling clock is selected by the INT0F1 to INT0F0 bits
in the INT0F register. The IR bit in the INT0IC register is set to “1” (interrupt requested) when the
INT0 level is sampled for every sampling clock and the sampled input level matches three times.
Figure 11.12 shows the Configuration of INT0 Input Filter. Figure 11.13 shows the Operating
Example of INT0 Input Filter.
Jan 19, 2006
INT0 Input Filter
Port P4_5
Direction
Register
INT0
This is an operation example when the INT0F1 to INT0F0 bits in the
INT0F register is set to “01b”, “10b”, or “11b”(passing digital filter).
Configuration of INT0 Input Filter
Operating Example of INT0 Input Filter
INT0F0, INT0F1 : Bits in INT0F register
INT0EN, INT0PL : Bits in INTEN register
f32
f1
f8
INT0F1 to INT0F0
=01b
=10b
=11b
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Sampling Clock
matches 3x)
Digital Filter
(input level
Other than
INT0F1 to INT0F0
=00b
INT0EN
=00b
Both Edges
Detection
Circuit
Set to “0” by program
INT0PL=0
INT0PL=1
INT0 Interrupt
11. Interrupt