R5F21324CNSP#U0 Renesas Electronics America, R5F21324CNSP#U0 Datasheet - Page 123

• 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 94 of 573
CM30 bit (Wait Control Bit)
When the CM30 bit is set to 1 (MCU enters wait mode), the CPU clock stops (wait mode). Since the XIN clock,
XCIN clock, and the on-chip oscillator clock do not stop, the peripheral functions using these clocks continue
operating. To set the CM30 bit to 1, set the I flag to 0 (maskable interrupt disabled).
The MCU exits wait mode by a reset or peripheral function interrupt. When the MCU exits wait mode by a
peripheral function interrupt, it resumes executing the instruction immediately after the instruction to set the
CM30 bit to 1.
When the MCU enters wait mode with the WAIT instruction, make sure to set the I flag to 1 (maskable interrupt
enabled). With this setting, interrupt handling is performed by the CPU when the MCU exits wait mode.
9. Clock Generation Circuit