R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 168

• Manufacturer Part Number: R5F21324CNSP#U0
• Description: MCU 1KB FLASH 16K ROM 20-LSSOP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/32Cr

Specifications of R5F21324CNSP#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: 15
• 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 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-LSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/32C Group
REJ09B0573-0100 Rev.1.00 Dec. 18, 2009
Page 139 of 573
Figure 11.9
Figure 11.10
11.4.5
INTi input
Sampling
timing
IR bit in
INTiIC register
The INTi input contains a digital filter. The sampling clock is selected using bits INTiF1 and INTiF0 in the
INTF register. The INTi level is sampled every sampling clock cycle and if the sampled input level matches
three times, the IR bit in the INTiIC register is set to 1 (interrupt requested).
Figure 11.9 shows the INTi Input Filter Configuration. Figure 11.10 shows an Operating Example of INTi Input
Filter.
Note:
This is an operating example when bits INTiF1 to INTiF0 in the INTF register are set to 01b, 10b, or 11b (digital filter enabled).
i = 0, 1, 3
INTi Input Filter (i = 0, 1, 3)
Port direction
Note:
1. INT0: Port P4_5 direction register
register
INTi Input Filter Configuration
Operating Example of INTi Input Filter
INT1: Port P1_5 direction register when P1_5 pin used
INT3: Port P3_3 direction register when P3_3 pin used
INTi
(1)
Port P1_7 direction register when P1_7 pin used
INTiF0, INTiF1: Bits in INTF register
INTiEN, INTiPL: Bits in INTEN register
i = 0, 1, 3
f32
f1
f8
INTiF1 to INTiF0
= 01b
= 10b
= 11b
Sampling clock
Digital filter
(input level
matches
3 times)
Other than
INTiF1 to INTiF0
= 00b
INTiEN
= 00b
Both edges
detection
circuit
Set to 0 by a program.
INTiPL = 0
INTiPL = 1
INTi interrupt
11. Interrupts