SH7619_09 Datasheet, PDF (245/860 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7619 Series

Section 8 Clock Pulse Generator (CPG)
Mode 1: The frequency of the external clock input from the EXTAL pin is quadrupled by PLL
circuit 2, and then the clock is supplied to this LSI. Since the input clock frequency ranging 10
MHz to 15.625 MHz can be used, the CKIO frequency ranges from 40 MHz to 62.5 MHz.
Mode 2: The frequency of the on-chip crystal oscillator output is quadrupled by PLL circuit 2, and
then the clock is supplied to this LSI. Since the crystal resonator frequency ranging 10 MHz to
15.625 MHz can be used, the CKIO frequency ranges from 40 MHz to 62.5 MHz.
Mode 5: The frequency of the external clock from the EXTAL pin is doubled by PLL circuit 2,
and then the clock is supplied to this LSI. Since the input clock frequency ranging 10 MHz to 25
MHz, the CKIO frequency ranges from 20 MHz to 50 MHz.
Mode 6: The frequency of the on-chip crystal oscillator output is doubled by PLL circuit 2, and
then the clock is supplied to the LSI. Since the crystal oscillation frequency ranging 10 MHz to 25
MHz can be used, the CKIO frequency ranges from 20 MHz to 50 MHz.
Table 8.3 Possible Combination of Clock Modes and FRQCR Values
Mode
FRQCR
Register
Value
PLL
Circuit 1
PLL
Circuit 2
1 or 2 H'1000 ON (×1) ON (×4)
H'1001 ON (×1) ON (×4)
H'1003 ON (×1) ON (×4)
H'1101 ON (×2) ON (×4)
H'1103 ON (×2) ON (×4)
5 or 6 H'1000 ON (×1) ON (×2)
H'1001 ON (×1) ON (×2)
H'1003 ON (×1) ON (×2)
H'1101 ON (×2) ON (×2)
H'1103 ON (×2) ON (×2)
Note: * Input clock is assumed to be 1.
Clock Ratio*
(I:B:P)
Input Clock
Frequency Range
(Pφ must be equal
to or lower than
31.25 MHz)
CKIO Pin
Frequency
Range
4:4:4
4:4:2
10 MHz to
15.625 MHz
40 MHz to
62.5 MHz
4:4:1
8:4:4
8:4:2
2:2:2
2:2:1
10 MHz to
25 MHz
20 MHz to
50 MHz
2:2:1/2
4:2:2
4:2:1
Rev. 6.00 Jul. 15, 2009 Page 205 of 816
REJ09B0237-0600