R5F21346CNFP#U0 Renesas Electronics America, R5F21346CNFP#U0 Datasheet - Page 160
R5F21346CNFP#U0
Manufacturer Part Number
R5F21346CNFP#U0
Description
MCU 1KB FLASH 32K ROM 48-LQFP
Manufacturer
Renesas Electronics America
Series
R8C/3x/34Cr
Datasheet
1.R5F21346CNFPU0.pdf
(759 pages)
Specifications of R5F21346CNFP#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
43
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
2.5K 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
48-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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R8C/34C Group
REJ09B0586-0100 Rev.1.00 Jan 13, 2010
Page 127 of 723
Figure 9.3
Step (1)
Step (2)
Step (3)
Step (4)
Step (5)
Step (6)
Step (7)
Step (8)
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 the MCU enters wait mode, follow 9.7.2 Wait Mode.
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.
(internal power low consumption enabled)
(internal power low consumption disabled)
(Wait until XIN clock or high-speed on-chip
Procedure for enabling reduced internal
power consumption using VCA20 bit
oscillator clock oscillation stabilizes)
high-speed on-chip oscillator mode
high-speed on-chip oscillator clock
high-speed on-chip oscillator clock
low-speed on-chip oscillator mode
Enter high-speed clock mode or
Enter low-speed clock mode or
Procedure for Reducing Internal Power Consumption Using VCA20 bit
Stop XIN clock and
Enter wait mode
Start XIN clock or
VCA20 ← 1
VCA20 ← 0
(4)
(2, 3)
(2)
Exit wait mode by interrupt
Step (5)
Step (6)
Step (7)
Step (8)
Step (1)
Step (2)
Step (3)
(internal power low consumption enabled)
(This is automatically set when exiting wait mode)
(Wait until XIN clock or high-speed on-chip
(internal power low consumption disabled)
or high-speed on-chip oscillator clock
oscillator clock oscillation stabilizes)
high-speed on-chip oscillator mode
high-speed on-chip oscillator clock
low-speed on-chip oscillator mode
Enter high-speed clock mode or
Enter low-speed clock mode or
Interrupt handling completed
Stop XIN clock and
In interrupt routine
Interrupt handling
Start XIN clock
VCA20 ← 1
VCA20 ← 0
(Note 1)
(2)
(2, 3)
9. Clock Generation Circuit
If it is necessary to start
the high-speed clock or
high-speed on-chip oscillator
during the interrupt routine,
execute steps (6) to (7)
in the routine.
If the high-speed clock or
high-speed on-chip oscillator
starts during the interrupt
routine, execute steps (1) to
(3) at the end of the routine.
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