HD6417751RBP240V Datasheet, PDF (369/1226 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

10. Clock Oscillation Circuits
10.2 Overview of CPG
10.2.1 Block Diagram of CPG
Figures 10.1(1) and 10.1(2) show a block diagram of the CPG in the SH7751 and SH7751R.
XTAL
EXTAL
MD8
Oscillator circuit
Crystal
oscillation
circuit
PLL circuit 1
×6
Frequency
divider 2
×1
×1/2
×1/3
×1/4
×1/6
×1/8
Frequency
divider 1
×1/2
CKIO
PLL circuit 2
×1
CPU clock (Ick)
cycle Icyc
Peripheral module
clock (Pck) cycle
Pcyc
Bus clock (Bck)
cycle Bcyc
MD2
MD1
MD0
CPG control unit
Clock frequency
control circuit
Standby control
circuit
FRQCR
STBCR
Bus interface
STBCR2
Legend:
FRQCR: Frequency control register
STBCR: Standby control register
STBCR2: Standby control register 2
Internal bus
Figure 10.1 (1) Block Diagram of CPG (SH7751)
Rev.4.00 Oct. 10, 2008 Page 269 of 1122
REJ09B0370-0400