R5F21334CNFP#U0 Renesas Electronics America, R5F21334CNFP#U0 Datasheet - Page 152

• 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 122 of 589
9.7.3
Table 9.4
Key input interrupt
INT0, INT1, INT3 interrupt Usable if there is no filter
Timer RA interrupt
Serial interface interrupt
Voltage monitor 1 interrupt Usable in digital filter disabled mode (VW1C1 bit in VW1C register is set to 1)
Voltage monitor 2 interrupt Usable in digital filter disabled mode (VW2C1 bit in VW2C register is set to 1)
9.7.3.1
9.7.3.2
Since all oscillator circuits except fOCO-WDT stop in stop mode, the CPU and peripheral function clocks stop
and the CPU and the peripheral functions operating with these clocks also stop. The least power required to
operate the MCU is in stop mode. If the voltage applied to the VCC pin is VRAM or more, the contents of
internal RAM is retained.
The peripheral functions clocked by external signals continue operating.
Table 9.4 lists Interrupts to Exit Stop Mode and Usage Conditions.
The MCU enters stop mode when the CM10 bit in the CM1 register is set to 1 (all clocks stop). At the same
time, the CM06 bit in the CM0 register is set to 1 (divide-by-8 mode).
To use stop mode, set the following before the MCU enters stop mode:
•
•
Enter stop mode after setting the FMR27 bit to 0 (low-current-consumption read mode disabled). Do not enter
stop mode while the FMR27 bit is 1 (low-current-consumption read mode enabled).
The I/O port retains the status before the MCU enters stop mode.
However, when the CM13 bit in the CM1 register is set to 1 (XIN-XOUT pin), the XOUT(P4_7) pin is held
“H”. When the CM13 bit is set to 0 (input ports P4_6 and P4_7), the P4_7(XOUT pin) is held in an input status.
Bits OCD1 to OCD0 in the OCD register = 00b
CM35 bit in CM3 register = 0 (settings of CM06 bit in CM0 register and bits CM16 and CM17 in CM1
register enabled)
Interrupt
Stop Mode
Entering Stop Mode
Pin Status in Stop Mode
Interrupts to Exit Stop Mode and Usage Conditions
−
Usable if there is no filter when external pulse is counted in event counter
mode
When external clock selected
Usage Conditions
9. Clock Generation Circuit