R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 158

• Manufacturer Part Number: R5F21334CNFP#U0
• Description: MCU 1KB FLASH 16K ROM 32-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/3x/33Cr

Specifications of R5F21334CNFP#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: 27
• 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 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/33C Group
REJ09B0570-0100 Rev.1.00 Dec. 14, 2009
Page 128 of 589
Figure 9.11
To oscillation stop detection
(oscillation stop detection
interrupt disabled)
Note:
OCD1 to OCD3: Bits in OCD register
VW2C2, VW2C3: Bits in VW2C register
Set OCD1 bit to 0
Interrupt sources
(XIN clock stops)
Determination of
interrupt routine
1. This disables multiple oscillation stop detection interrupts.
OCD3 = 1?
YES
Example of Determining Interrupt Sources for Oscillation Stop Detection, Watchdog
Timer, Voltage Monitor 1, or Voltage Monitor 2 Interrupt
(1)
NO
interrupt enabled) and OCD2 = 1
selected as system clock)?
(oscillation stop detection
(on-chip oscillator clock
OCD1 = 1
YES
NO
(watchdog timer underflow)
To watchdog timer
interrupt routine
VW2C3 = 1?
YES
NO
To voltage monitor 2
interrupt routine
(Vdet2 passed)
VW2C2 = 1?
YES
9. Clock Generation Circuit
NO
To voltage monitor 1
interrupt routine