HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 375

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

11.3
Table 11.2 shows the relationship between the mode control pins (MD2 and MD1) combinations
and the clock operating modes. Table 11.3 shows the usable frequency ranges in the clock
operating.
Table 11.2 Clock Operating Modes
Mode
5
6
7
Mode 5: This LSI is supplied with a clock that is doubled by the PLL circuit 2 after receiving an
external clock from the EXTAL pin. This reduces the frequency of the externally generated clock.
Input clock frequency and CKIO frequency range from 10 MHz to 30 MHz and from 20 MHz to
60 MHz, respectively.
Mode 6: This LSI is supplied with a clock that is doubled by the PLL circuit 2 after operating the
on-chip crystal oscillator. This reduces the frequency of the externally generated clock. Input
clock frequency and CKIO frequency range from 10 MHz to 30 MHz and from 20 MHz to 60
MHz, respectively.
Mode 7: In this mode, the CKIO pin functions as an input. This LSI is supplied with a clock that
is wave-formed and multiplied by PLL circuit 1 and multiplied after receiving an external clock.
This mode is effective for connecting synchronous DRAM because the PLL circuit 1. Input clock
frequency (CKIO frequency) range from 20 MHz to 60 MHz.
MD2
1
0
1
Clock Operating Modes
Pin Values
MD1
0
0
1
Source
EXTAL
Crystal
resonator
CKIO
Clock I/O
CKIO

Output
CKIO
ON (×2)
ON (×2)
OFF
PLL2 On/Off
Rev. 1.00, 02/04, page 337 of 804
PLL1 On/Off
ON (×1, 2, 3, 4) (EXTAL) ×2
ON (×1, 2, 3, 4) (Crystal
ON (×1, 2, 3, 4) (CKIO)
CKIO
Frequency
resonator) ×2