R5F21294SNSP#U0 Renesas Electronics America, R5F21294SNSP#U0 Datasheet - Page 100

• Manufacturer Part Number: R5F21294SNSP#U0
• Description: MCU 3/5V 16K+2K 20PIN-SSOP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/R8C/Tiny/29r

Specifications of R5F21294SNSP#U0

• Core Processor: R8C
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, LIN, SIO, SSU, UART/USART
• Peripherals: LED, POR, Voltage Detect, WDT
• Number Of I /o: 13
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

R8C/28 Group, R8C/29 Group
Rev.2.10
REJ09B0279-0210
Figure 10.10
Step (1)
Step (2)
Step (3)
Step (4)
Step (5)
Step (6)
Step (7)
Step (8)
NOTES:
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 10.7.2 Wait Mode.
VCA20: Bit in VCA2 register
clock or the high-speed on-chip oscillator in the interrupt handling, it does not need to be started.
Enter low-speed clock mode or low-speed on-
VCA20 ← 1 (internal power low consumption
VCA20 ← 0 (internal power low consumption
Sep 26, 2008
(Wait until XIN clock oscillation stabilizes)
low consumption enabled by VCA20 bit
Stop XIN clock and high-speed on-chip
Start XIN clock or high-speed on-chip
Handling procedure of internal power
high-speed on-chip oscillator mode
Enter high-speed clock mode or
Procedure for Enabling Reduced Internal Power Consumption Using VCA20 bit
chip oscillator mode
Enter wait mode
oscillator clock
oscillator clock
enabled)
disabled)
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(2, 3)
(2)
(4)
Step (5)
Step (6)
Step (7)
Step (8)
Step (1)
Step (2)
Step (3)
Exit wait mode by
interrupt
Enter mode other than low-speed clock mode
VCA20 ← 0 (internal power low consumption
VCA20 ← 1 (internal power low consumption
(Wait until XIN clock oscillation stabilizes)
Stop XIN clock and high-speed on-chip
Start XIN clock or high-speed on-chip
or low-speed on-chip oscillator mode
low-speed on-chip oscillator mode
Enter low-speed clock mode or
Interrupt handling completed
In interrupt handling routine
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.