SH7721 datasheet(516/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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516 / 1524 page

Section 11

Clock Pulse Generator (CPG)

Rev. 3.00 Jan. 18, 2008 Page 454 of 1458

REJ09B0033-0300

A block diagram of the CPG is shown in figure 11.1.

CKIO

EXTAL_USB

XTAL

Crystal

oscillator

PLL circuit 1

(

×1, 2, 3, 4)

PLL circuit 2

(

×1, 4)

Oscillator circuit

Clock frequency

control unit

Standby control unit

FRQCR

STBCR

Bus interface

Internal bus

FRQCR : Frequency control register

UCKCR : USBH/USBF clock control register

STBCR : Standby control register 1

STBCR2 : Standby control register 2

STBCR3 : Standby control register 3

STBCR4 : Standby control register 4

STBCR5 : Standby control register 5

Peripheral clock

φ)

EXTAL

MD2 to MD0

CPG control unit

XTAL_USB

× 1

× 1/2

× 1/3

× 1/4

× 1/6

Internal clock

φ)

USBH/USBF clock

Divider 1

Bus clock

φ frequency is the same

as CKIO frequency.)

STBCR3

STBCR2

UCLKCR

STBCR4

STBCR5

Crystal

oscillator

Figure 11.1

Block Diagram of CPG

SH7721 Datasheet(PDF) 516 Page - Renesas Technology Corp

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