HD6417705F133V Datasheet, PDF (323/741 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

9.3 Clock Operating Modes
Table 9.2 shows the relationship between the mode control pins (MD2 to MD0) combinations and
the clock operating modes. Table 9.3 shows the usable frequency ranges in the clock operating
modes and the frequency range of the input clock.
Table 9.2 Clock Operating Modes
Pin Values
Clock I/O
Mode MD2
0
0
1
0
2
0
MD1
0
0
1
MD0
0
1
0
4
1
0
0
5
1
0
1
6
1
1
0
7
1
1
1
Source Output
EXTAL CKIO
EXTAL CKIO
Crystal CKIO
resonator
Crystal CKIO
resonator
EXTAL CKIO
Crystal CKIO
resonator
CKIO 
PLL2
On/Off
ON (× 1)
ON (× 4)
ON (× 4)
PLL1
On/Off
ON (× 1, 2, 3, 4)
ON (× 1, 2, 3, 4)
ON (× 1, 2, 3, 4)
CKIO
Frequency
(EXTAL)
(EXTAL) × 4
(Crystal) × 4
ON (× 1) ON (× 1, 2, 3, 4) (Crystal)
ON (× 2) ON (× 1, 2, 3, 4)
ON (× 2) ON (× 1, 2, 3, 4)
(EXTAL) × 2
(Crystal) × 2
OFF
ON (× 1, 2, 3, 4) (CKIO)
Mode 0: An external clock is input from the EXTAL pin and executes waveform shaping by PLL
circuit 2 before being supplied inside this LSI.
Mode 1: An external clock is input from the EXTAL pin and its frequency is multiplied by 4 by
PLL circuit 2 before being supplied inside this LSI, allowing a low-frequency external clock to be
used.
Mode 2: The on-chip crystal oscillator operates, with the oscillation frequency being multiplied by
4 by PLL circuit 2 before being supplied inside this LSI, allowing a low-frequency external clock
to be used.
Mode 4: The on-chip crystal oscillator operates and executes waveform shaping by PLL circuit 2
before being supplied inside this LSI.
Mode 5: An external clock is input from the EXTAL pin and its frequency is multiplied by 2 by
PLL circuit 2 before being supplied inside this LSI, allowing a low-frequency external clock to be
used.
Mode 6: The on-chip crystal oscillator operates, with the oscillation frequency being multiplied by
2 by PLL circuit 2 before being supplied inside this LSI, allowing a low crystal frequency to be
used.
Rev. 2.00, 09/03, page 275 of 690