R5F21217JFP#U1 Renesas Electronics America, R5F21217JFP#U1 Datasheet - Page 96

• Manufacturer Part Number: R5F21217JFP#U1
• Description: MCU FLASH 48K 2.5K CMOS 48LQFP
• Manufacturer: Renesas Electronics America
• Series: R8C/2x/21r

Specifications of R5F21217JFP#U1

• 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: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.5K 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
Figure 10.10
Step (1)
Step (2)
Step (3)
Step (4)
Step (5)
Step (6)
Step (7)
Step (8)
10.4.2.5
NOTES:
VCA20: Bit in VCA2 register
1. Execute this handling to all interrupt handlings generated around the WAIT instruction. If it is not necessary to start the high-speed
2. Do not set the VCA20 bit to 0 with the instruction immediately after setting the VCA20 bit to 1. Also, do not do the opposite.
3. When the VCA20 bit is set to 1, do not set the CM10 bit to 1 (stop mode).
4. When entering wait mode, follow 10.6.2 Wait Mode.
Internal power consumption can be reduced by using low-speed on-chip oscillator mode.
Figure 10.10 shows the Procedure for Enabling Reduced Internal Power Consumption Using VCA20 bit.
When enabling reduced internal power consumption using the VCA20 bit, follow Figure 10.10 Procedure for
Enabling Reduced Internal Power Consumption Using VCA20 bit.
clock or the high-speed on-chip oscillator in the interrupt handling, it does not need to be started.
VCA20 ← 1 (internal power low consumption
VCA20 ← 0 (internal power low consumption
Enter high-speed clock mode or high-speed
(Wait until XIN clock oscillation stabilizes)
Enter low-speed on-chip oscillator mode
low consumption enabled by VCA20 bit
Stop XIN clock and high-speed on-chip
Handling procedure of internal power
Start XIN clock or high-speed on-chip
Reducing Internal Power Consumption
Procedure for Enabling Reduced Internal Power Consumption Using VCA20 bit
on-chip oscillator mode
Enter wait mode
oscillator clock
oscillator clock
disabled)
enabled)
Page 78 of 458
(2)
(2)
(4)
Exit wait mode by
Step (5)
Step (6)
Step (7)
Step (8)
Step (1)
Step (2)
Step (3)
interrupt
VCA20 ← 0 (internal power low consumption
VCA20 ← 1 (internal power low consumption
Enter high-speed clock mode or high-speed
(Wait until XIN clock oscillation stabilizes)
Enter low-speed on-chip oscillator mode
Stop XIN clock and high-speed on-chip
Start XIN clock or high-speed on-chip
Interrupt handling completed
In interrupt handling routine
on-chip oscillator mode
Interrupt handling
oscillator clock
oscillator clock
enabled)
disabled)
(2,3)
(2)
(Note 1)
10. Clock Generation Circuit
If it is necessary to start
the high-speed clock or
the high-speed on-chip
oscillator in the interrupt
handling routine, execute
steps (5) to (7) in the
interrupt routine.
If the high-speed clock or
high-speed on-chip
oscillator is started in the
interrupt handling routine,
execute steps (1) to (3) at
the last of the interrupt
routine.