R5F21266SNFP#U0 Renesas Electronics America, R5F21266SNFP#U0 Datasheet - Page 118
![IC R8C/26 MCU FLASH 32LQFP](/photos/12/37/123707/r5f21266snfp_u0_sml.jpg)
R5F21266SNFP#U0
Manufacturer Part Number
R5F21266SNFP#U0
Description
IC R8C/26 MCU FLASH 32LQFP
Manufacturer
Renesas Electronics America
Series
R8C/2x/26r
Datasheet
1.R5F21272SDFPU0.pdf
(487 pages)
Specifications of R5F21266SNFP#U0
Core Size
16/32-Bit
Program Memory Size
32KB (32K x 8)
Core Processor
R8C
Speed
20MHz
Connectivity
I²C, LIN, SIO, SSU, UART/USART
Peripherals
LED, POR, Voltage Detect, WDT
Number Of I /o
25
Program Memory Type
FLASH
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
2.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
32-LQFP
No. Of I/o's
25
Ram Memory Size
1.5KB
Cpu Speed
20MHz
No. Of Timers
4
Digital Ic Case Style
LQFP
Supply Voltage Range
2.2V To 5.5V
Embedded Interface Type
I2C, UART
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
R0K521276S000BE - KIT DEV RSK-R8C/26-29R0E521000EPB00 - PROBE EMULATOR FOR PC7501
Eeprom Size
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
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R8C/26 Group, R8C/27 Group
Rev.2.10
REJ09B0278-0210
Figure 10.14
Step (1)
Step (2)
Step (3)
Step (4)
Step (5)
Step (6)
Step (7)
Step (8)
10.5.2.5
NOTES:
VCA20: Bit in VCA2 register
1. Execute this routine to handle all interrupts generated in wait mode.
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.
Internal power consumption can be reduced by using low-speed clock mode (for N, D version only) or low-
speed on-chip oscillator mode. Figure 10.14 shows the Procedure for Enabling Reduced Internal Power
Consumption Using VCA20 bit.
When enabling reduced internal power consumption using the VCA20 bit, follow Figure 10.14 Procedure for
Enabling Reduced Internal Power Consumption Using VCA20 bit.
However, this does not apply if it is not necessary to start the high-speed clock or high-speed on-chip oscillator during the interrupt routine.
VCA20 ← 1 (internal power low consumption
VCA20 ← 0 (internal power low consumption
Sep 26, 2008
Enter low-speed clock mode or low-speed
(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
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
enabled)
disabled)
(2, 3)
Page 99 of 453
(2)
(4)
Exit wait mode by interrupt
Step (5)
Step (6)
Step (7)
Step (8)
Step (1)
Step (2)
Step (3)
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
high-speed on-chip oscillator mode
low-speed on-chip oscillator mode
Enter high-speed clock mode or
Enter low-speed clock mode or
Interrupt handling completed
In interrupt 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
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 routine, execute
steps (1) to (3) at the last of
the interrupt routine.
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