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Section 4 Clock Pulse Generator (CPG)
Rev. 4.00 Sep. 14, 2005 Page 144 of 982
REJ09B0023-0400
CKIO
CKIO2
PLL circuit 1
(×1, 2, 3, 4)
×1
×1/2
×1/3
×1/4
Clock pulse generator
Divider
Internal clock
(Iφ)
Internal bus
Bus interface
FRQCR:
STBCR:
STBCR2:
STBCR3:
STBCR4:
[Legend]
Frequency control register
Standby control register
Standby control register 2
Standby control register 3
Standby control register 4
Peripheral clock
(Pφ)
Bus clock
(Bφ = CKIO)
EXTAL
MD2
MD0
XTAL
FRQCR
STBCR
STBCR2
STBCR3 STBCR4
CPG control unit
Clock frequency
control circuit
Standby control circuit
PLL circuit 2
(× 2,4)
Crystal
oscillator
Figure 4.1 Block Diagram of Clock Pulse Generator