3 clock operating modes – Renesas SH7781 User Manual

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15. Clock Pulse Generator (CPG)

Rev.1.00 Jan. 10, 2008 Page 737 of 1658

REJ09B0261-0100

15.3

Clock Operating Modes

Table 15.2 shows the relationship between setting of the mode pins (MODE0 to MODE4) and the
clock operating modes.

Table 15.2 Clock Operating Modes and Operations of the Oscillator and PLLs

Setting of Mode Control Pins*

Clock
Operating
Mode

MODE4 MODE3 MODE2 MODE1 MODE0 Divider

1 PLL1

PLL2

L L L L L

× 1 On

(

× 72) On

L L L L H

× 1 On

(

× 72) On

L L L H L

× 1 On

(

× 72) On

L L L H H

× 1 On

(

× 72) On

16 H L L L L

× 1 On

(

× 36) On

17 H L L L H

× 1 On

(

× 36) On

H L L H L

× 1 On

(

× 36) On

H L L H H

× 1 On

(

× 36) On

Notes: 1. For the MODE0 to MODE4 pins, setting except the above mode pins (MODE0 to

MODE4) is prohibited.

2. L stands for 'low level', and H stands for 'high level'.