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Section 4 Clock Pulse Generator (CPG)
Rev. 4.00 Sep. 14, 2005 Page 147 of 982
REJ09B0023-0400
Mode 2: The frequency of the signal received from the EXTAL pin or crystal resonator LSI is
quadrupled by the PLL circuit 2 before it is supplied as the clock signal. This lowers the frequency
required of the externally generated clock. Either a crystal resonator with a frequency in the range
from 10 to 12.5 MHz or an external signal in the same frequency range input on the EXTAL pin
may be used. The frequency range of CKIO is from 40 to 50 MHz.
Mode 6: The frequency of the signal received from the EXTAL pin or crystal resonator LSI is
doubled by the PLL circuit 2 before it is supplied as the clock signal. This lowers the frequency
required of the crystal resonator. A crystal resonator or an external signal with a frequency in the
range from 10 to 25 MHz may be used. The frequency range of CKIO is from 20 to 50 MHz.
Mode 7: In this mode, the CKIO pin functions as an input pin. An external clock signal is
supplied to this pin; after this signal is received, the PLL circuit 1 shapes its waveform and
multiplies its frequency. The resulting clock signal is then supplied within the LSI. For reduced
current and hence power consumption, pull up the EXTAL pin and open the XTAL pin when the
LSI is used in mode 7.
Table 4.3 Relationship between Clock Mode and Frequency Range
PLL frequency
multiplier Selectable frequency ranges (MHz)
Clock
operating
mode
FRQCR
register
setting
PLL
Circuit 1
PLL
Circuit 2
Ratio of internal
clock frequencies
(I:B:P)
Input clock
Output clock
(CKIO pin)
Internal clock Bus clock Peripheral clock
2 H'1001 ON (×1) ON (×4) 4:4:2 10 to 12.5 40 to 50 40 to 50 40 to 50 20 to 25
H'1002 ON (×1) ON (×4) 4:4:4/3 10 to 12.5 40 to 50 40 to 50 40 to 50 13.33 to 16.66
H'1003 ON (×1) ON (×4) 4:4:1 10 to 12.5 40 to 50 40 to 50 40 to 50 10 to 12.5
H'1103 ON (×2) ON (×4) 8:4:2 10 to 12.5 40 to 50 80 to 100 40 to 50 20 to 25
H'1113 ON (×2) ON (×4) 4:4:2 10 to 12.5 40 to 50 40 to 50 40 to 50 20 to 25
6 H'1000 ON (×1) ON (×2) 2:2:2 10 to 16.66 20 to 33.33 20 to 33.33 20 to 33.33 20 to 33.33
H'1001 ON (×1) ON (×2) 2:2:1 10 to 25 20 to 50 20 to 50 20 to 50 10 to 25
H'1002 ON (×1) ON (×2) 2:2:2/3 10 to 25 20 to 50 20 to 50 20 to 50 6.66 to 16.66
H'1003 ON (×1) ON (×2) 2:2:1/2 10 to 25 20 to 50 20 to 50 20 to 50 5 to 12.5
H'1101 ON (×2) ON (×2) 4:2:2 10 to 16.66 20 to 33.33 40 to 66.66 20 to 33.33 20 to 33.33
H'1103 ON (×2) ON (×2) 4:2:1 10 to 25 20 to 50 40 to 100 20 to 50 10 to 25
H'1111 ON (×2) ON (×2) 2:2:2 10 to 16.66 20 to 33.33 20 to 33.33 20 to 33.33 20 to 33.33
H'1113 ON (×2) ON (×2) 2:2:1 10 to 25 20 to 50 20 to 50 20 to 50 10 to 25
H'1202 ON (×3) ON (×2) 6:2:2 13.33 to 16.66 26.66 to 33.33 80 to 100 26.66 to 33.33 26.66 to 33.33
H'1222 ON (×3) ON (×2) 2:2:2 13.33 to 16.66 26.66 to 33.33 26.66 to 33.33 26.66 to 33.33 26.66 to 33.33