RX230 Datasheet, PDF (110/177 Pages) Renesas Technology Corp – 54-MHz 32-bit RX MCUs, built-in FPU, 88.56 DMIPS, up to 512-KB flash memory

RX230 Group, RX231 Group
5. Electrical Characteristics
5.3 AC Characteristics
5.3.1
Clock Timing
Table 5.21 Operating Frequency Value (High-Speed Operating Mode)
Conditions: 1.8 V ≤ VCC = VCC_USB = AVCC0 ≤ 5.5 V, VSS = AVSS0 = VREFL0 = VSS_USB = 0 V, T_a = –40 to +105°C
VCC
Item
Symbol _{1.8 V ≤ VCC 2.4 V ≤ VCC 2.7 V ≤ VCC When USB} Unit
< 2.4 V
< 2.7 V
≤ 5.5 V
is in Use*³
Maximum
System clock (ICLK)
f_max
8
operating
frequency*⁴
FlashIF clock (FCLK)*^1, *²
8
Peripheral module clock (PCLKA)
8
16
54
54
MHz
16
32
32
16
54
54
Peripheral module clock (PCLKB)
8
16
32
32
Peripheral module clock (PCLKD)
8
32
54
54
External bus clock (BCLK)
8
16
32
32
BCLK pin output
8
8
16
16
USB clock (UCLK)
f_usb
—
—
—
48
Note 1.
Note 2.
Note 3.
Note 4.
The lower-limit frequency of FCLK is 1 MHz during programming or erasing of the flash memory. When FCLK is in use at below
4 MHz, the frequency can be set to 1 MHz, 2 MHz, or 3 MHz. A non-integer frequency such as 1.5 MHz cannot be set.
The frequency accuracy of FCLK must be within ±3.5%.
The VCC_USB range is 3.0 to 5.5 V when the USB clock is in use.
The maximum operating frequency listed above does not include errors of the external oscillator and internal oscillator. For
details on the range for the guaranteed operation, see Table 5.26, Clock Timing.
Table 5.22 Operating Frequency Value (Middle-Speed Operating Mode)
Conditions: 1.8 V ≤ VCC = VCC_USB = AVCC0 ≤ 5.5 V, VSS = AVSS0 = VREFL0 = VSS_USB = 0 V, T_a = –40 to +105°C
VCC
Item
Symbol _{1.8 V ≤ VCC 2.4 V ≤ VCC 2.7 V ≤ VCC When USB} Unit
< 2.4 V
< 2.7 V
≤ 5.5 V
is in Use*³
Maximum
System clock (ICLK)
f_max
8
operating
frequency*⁴
FlashIF clock (FCLK)*^1, *²
8
Peripheral module clock (PCLKA)
8
12
12
12
MHz
12
12
12
12
12
12
Peripheral module clock (PCLKB)
8
12
12
12
Peripheral module clock (PCLKD)
8
12
12
12
External bus clock (BCLK)
8
12
12
12
BCLK pin output
8
8
12
12
USB clock (UCLK)
f_usb
—
—
—
48
Note 1.
Note 2.
Note 3.
Note 4.
The lower-limit frequency of FCLK is 1 MHz during programming or erasing of the flash memory. When using FCLK at below 4
MHz, the frequency can be set to 1 MHz, 2 MHz, or 3 MHz. A non-integer frequency such as 1.5 MHz cannot be set.
The frequency accuracy of FCLK must be within ±3.5%.
The VCC_USB range is 3.0 to 5.5 V when the USB clock is in use.
The maximum operating frequency listed above does not include errors of the external oscillator and internal oscillator. For
details on the range for the guaranteed operation, see Table 5.26, Clock Timing.
R01DS0261EJ0110 Rev.1.10
Oct 30, 2015
Page 110 of 177