R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 175

• 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 146 of 573
11.8
11.8.1
11.8.2
11.8.3
Do not read address 00000h by a program. When a maskable interrupt request is acknowledged, the CPU reads
interrupt information (interrupt number and interrupt request level) from 00000h in the interrupt sequence. At
this time, the IR bit for the acknowledged interrupt is set to 0.
If address 00000h is read by a program, the IR bit for the interrupt which has the highest priority among the
enabled interrupts is set to 0. This may cause the interrupt to be canceled, or an unexpected interrupt to be
generated.
Set a value in the SP before an interrupt is acknowledged. The SP is set to 0000h after a reset. If an interrupt is
acknowledged before setting a value in the SP, the program may run out of control.
Either the “L” level width or “H” level width shown in the Electrical Characteristics is required for the signal
input to pins INT0, INT1, INT3 and pins KI0 to KI3, regardless of the CPU clock.
For details, refer to Table 31.21 (VCC = 5V), Table 31.27 (VCC = 3V), Table 31.33 (VCC = 2.2V) External
Interrupt INTi (i = 0, 1, 3) Input, Key Input Interrupt KIi (i = 0 to 3).
Notes on Interrupts
Reading Address 00000h
SP Setting
External Interrupt and Key Input Interrupt
11. Interrupts