R01UH0822EJ0100 Rev.1.00
Page 176 of 1041
Jul 31, 2019
RX13T Group
11. Low Power Consumption
Note:
When using the FCLK at lower than 4 MHz during programming or erasing the flash memory, the frequency can be set to 1, 2,
or 3 MHz.
Each operating power control mode is described below.
High-Speed Operating Mode
The maximum operating frequency during FLASH read is 32 MHz for ICLK, FCLK, PCLKB, and PCLKD.
During FLASH programming/erasure, the operating frequency range is 1 to 32 MHz.
Note:
When using the FCLK at lower than 4 MHz during programming or erasing the flash memory, the frequency can
be set to 1, 2, or 3 MHz.
Middle-Speed Operating Mode
As compared to high-speed operating mode, this mode reduces power consumption for low-speed operation.
The maximum operating frequency during FLASH read is 12 MHz for ICLK, FCLK, PCLKB, and PCLKD.
During FLASH programming/erasure, the operating frequency range is 1 to 12 MHz.
The power consumption of this mode is lower than that of high speed mode under the same conditions.
After a reset is canceled, operation is started from this mode.
Note:
When using the FCLK at lower than 4 MHz during programming or erasing the flash memory, the frequency can
be set to 1, 2, or 3 MHz.
Table 11.3
Operating Frequency and Voltage Ranges in Operating Power Control Modes
Operating Power
Control Mode
OPCM
[2:0] Bits
Operating
Voltage
Range
Operating Frequency Range
Flash Memory Read Frequency
Flash Memory
Programming/
Erasure Frequency
ICLK
FCLK
PCLKD
PCLKB
FCLK
High-speed
operating mode
000b
2.7 to 5.5 V
Up to 32 MHz
Up to 32 MHz
Up to 32 MHz
Up to 32 MHz
1 to 32 MHz
Middle-speed
operating mode
010b
2.7 to 5.5 V
Up to 12 MHz
Up to 12 MHz
Up to 12 MHz
Up to 12 MHz
1 to 12 MHz