r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 82

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Section 4 Clock Pulse Generator (CPG)
Figure 4.1 shows a block diagram of the clock pulse generator.
Rev. 1.00 Sep. 21, 2007 Page 56 of 1124
REJ09B0402-0100
stop detection
Oscillation
[Legend]
FRQCR:
OSCCR:
STBCR1:
STBCR2:
STBCR3:
STBCR4:
STBCR5:
STBCR6:
EXTAL
XTAL
CK
Frequency control register
Oscillation stop detection control register
Standby control register 1
Standby control register 2
Standby control register 3
Standby control register 4
Standby control register 5
Standby control register 6
OSCCR
Oscillation stop
detection circuit
oscillator
Crystal
Figure 4.1 Block Diagram of Clock Pulse Generator
Clock frequency
control circuit
FRQCR
STBCR1
PLL circuit
Oscillator unit
(×8)
CPG control unit
STBCR2
Internal bus
Bus interface
Divider
×1
×1/2
×1/3
×1/4
×1/8
STBCR3
control circuit
Standby
STBCR4
STBCR5
MTU2S clock
(MIφ)
MTU2 clock
(MPφ)
Internal clock
(Iφ)
Peripheral clock
(Pφ)
Bus clock
(Bφ = CK)
STBCR6