Rev. 2.00, 09/03, page 272 of 690
XTAL_USB
EXTAL_USB
CKIO
PLL circuit 1
(
×
1, 2, 3, 4)
Crystal
Oscillator
PLL circuit 2
(
×
1, 2, 4)
×
1
×
1/2
×
1/3
×
1/4
CPG oscillator circuit unit
Internal clock
(I
φ
)
Peripheral bus
Bus interface
FRQCR:
STBCR:
STBCR2:
STBCR3:
UCLKCR:
Frequency control register
Standby control register
Standby control register 2
Standby control register 3
USB clock control register
Peripheral clock
(P
φ
)
Bus clock
(B
φ
= CKIO)
XTAL
EXTAL
MD2
MD1
MD0
FRQCR
UCLKCR
STBCR
STBCR2
STBCR3
CPG control unit
USB clock
Clock frequency
control circuit
Standby control circuit
Divider 1
Crystal
Oscillator
Figure 9.1 Block Diagram of Clock Pulse Generator
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