HD6417618 datasheet(229/646 Pages) RENESAS

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Section 8 Clock Pulse Generator (CPG)

Rev. 6.00 Jun. 12, 2007 Page 197 of 610

REJ09B0131-0600

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 12.5 MHz can be used, the CKIO frequency ranges from 40 MHz to 50 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

12.5 MHz can be used, the CKIO frequency ranges from 40 MHz to 50 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

Value

PLL

Circuit 1

PLL

Circuit 2

Clock Ratio*

(I:B:P)

Input Clock

Frequency Range

CKIO Pin

Frequency

Range

H'1000

ON (

×1)

ON (

×4)

4:4:4

1 or 2

H'1001

ON (

×1)

ON (

×4)

4:4:2

10 MHz to

12.5 MHz

40 MHz to

50 MHz

H'1003

ON (

×1)

ON (

×4)

4:4:1

H'1101

ON (

×2)

ON (

×4)

8:4:4

H'1103

ON (

×2)

ON (

×4)

8:4:2

5 or 6

H'1000

ON (

×1)

ON (

×2)

2:2:2

H'1001

ON (

×1)

ON (

×2)

2:2:1

10 MHz to

25 MHz

20 MHz to

50 MHz

H'1003

ON (

×1)

ON (

×2)

2:2:1/2

H'1101

ON (

×2)

ON (

×2)

4:2:2

H'1103

ON (

×2)

ON (

×2)

4:2:1

Note:

Input clock is assumed to be 1.

HD6417618 Datasheet(PDF) 229 Page - Renesas Technology Corp

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