HD6417751 Datasheet, PDF (284/1105 Pages) Renesas Technology Corp – SuperH RISC engine

XTAL
EXTAL
MD8
Oscillator circuit
Crystal
oscillator
PLL circuit 1
×6
× 12
Frequency
divider 2
×1
× 1/2
× 1/3
× 1/4
× 1/6
× 1/8
CKIO
PLL circuit 2
×1
CPU clock (Iø)
cycle Icyc
Peripheral module
clock (Pø) cycle
Pcyc
Bus clock (Bø)
cycle Bcyc
MD2
MD1
MD0
CPG control unit
Clock frequency
control circuit
Standby control
circuit
FRQCR
STBCR
STBCR2
Bus interface
Internal bus
FRQCR: Frequency control register
STBCR: Standby control register
STBCR2: Standby control register 2
Figure 10.1(2) Block Diagram of CPG (SH7751R)
Rev. 3.0, 04/02, page 244 of 1064