R5F2121AJFP#U0 Renesas Electronics America, R5F2121AJFP#U0 Datasheet - Page 94

• Manufacturer Part Number: R5F2121AJFP#U0
• Description: MCU FLASH 96K 5K CMOS 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/21r

Specifications of R5F2121AJFP#U0

• Core Processor: R8C
• Core Size: 16/32-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: POR, Voltage Detect, WDT
• Number Of I /o: 41
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/20 Group, R8C/21 Group
Rev.2.00 Aug 27, 2008
REJ09B0250-0200
Table 10.3
Serial Interface Interrupt
Clock Synchronous Serial I/O
with Chip Select Interrupt /
I
Key Input Interrupt
A/D Conversion Interrupt
Timer RA Interrupt
Timer RB Interrupt
Timer RD Interrupt
Timer RE Interrupt
INT Interrupt
Voltage Monitor 2 Interrupt
Oscillation Stop Detection
Interrupt
2
10.4.2.4
C Bus Interface Interrupt
The MCU exits wait mode by a hardware reset or peripheral function interrupt. When using a hardware reset to
exit wait mode, set the ILVL2 to ILVL0 bits for the peripheral function interrupts to 000b (interrupts disabled)
before executing the WAIT instruction.
The peripheral function interrupts are affected by the CM02 bit. When the CM02 bit is set to 0 (peripheral
function clock does not stop in wait mode), all peripheral function interrupts can be used to exit wait mode.
When the CM02 bit is set to 1 (peripheral function clock stops in wait mode), the peripheral functions using the
peripheral function clock stop operating and the peripheral functions operated by external signals can be used
to exit wait mode.
Table 10.3 lists Interrupts to Exit Wait Mode and Usage Conditions.
Figure 10.9 shows the Time from Wait Mode to Interrupt Routine Execution.
When using a peripheral function interrupt to exit wait mode, set up the following before executing the WAIT
instruction.
When exiting by a peripheral function interrupt, the time (number of cycles) between interrupt request
generation and interrupt routine execution is determined by the settings of the FMSTP bit in the FMR0 register
as described in Figure 10.9.
The CPU clock, when exiting wait mode by a peripheral function interrupt, is the same clock as the CPU clock
when the WAIT instruction is executed.
(1) Set the interrupt priority level to the ILVL2 to ILVL0 bits in the interrupt control register of the
(2) Set the I flag to 1.
(3) Operate the peripheral function to use for exiting wait mode.
Interrupt
peripheral function interrupts to use for exiting wait mode. Set the ILVL2 to ILVL0 bits of the
peripheral function interrupts not to use for exiting wait mode to 000b (disables interrupt).
Exiting Wait Mode
Interrupts to Exit Wait Mode and Usage Conditions
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Usable when operating with
internal or external clock
Usable in all modes
Usable
Usable in one-shot mode
Usable in all modes
Usable in all modes
Usable in all modes
Usable in all modes
Usable
Usable
Usable
CM02 = 0
Usable when operating with external
clock
− (Do not use)
Usable
− (Do not use)
Can be used if there is no filter in event
counter mode.
Usable by selecting fOCO as count
source.
− (Do not use)
Usable by selecting fOCO40M as
count source
− (Do not use)
Usable (INT0 to INT3 can be used if
there is no filter.)
Usable
− (Do not use)
10. Clock Generation Circuit
CM02 = 1