R5F2L3ACBNFP datasheet(163/848 Pages) RENESAS

163 / 848 page

REJ09B0441-0010 Rev.0.10

Jul 30, 2008

Page 127 of 809

Under development Preliminary specification

Specifications in this manual are tentative and subject to change.

9. Clock Generation Circuit

R8C/L35A Group, R8C/L36A Group, R8C/L38A Group, R8C/L3AA Group,

R8C/L35B Group, R8C/L36B Group, R8C/L38B Group, R8C/L3AB Group

Figure 9.1

Clock Generation Circuit

S Q

1/2

Charge/

discharge

circuit

S Q

FRA00

High-speed

on-chip oscillator

FRA01 = 1

FRA01 = 0

CM14

Divider

Oscillation

stop

detection

XIN clock

XOUT

CM02

WAIT instruction

RESET

CM10 = 1 (stop mode)

CM06 = 0

CM17 to CM16 = 11b

CM06 = 1

CM06 = 0

CM17 to CM16 = 10b

CM06 = 0

CM17 to CM16 = 01b

CM06 = 0

CM17 to CM16 = 00b

Detail of divider

Oscillation Stop Detection Circuit

Pulse generation

circuit for

clock edge detection

and charge/

discharge control

XIN clock

Forcible discharge when OCD0 = 0

Watchdog timer interrupt

OCD1

OCD2 bit switch signal

CM14 bit switch signal

Oscillation stop detection,

watchdog timer,

voltage monitor 1 interrupt,

voltage monitor 2 interrupt

FRA2 register

fOCO-S

Voltage monitor 2 interrupt

System clock

Low-speed

on-chip

oscillator

FRA1 register, FRA3 register

Frequency adjustable

On-chip oscillator clock

Power-on reset circuit

Voltage detection circuit

Voltage monitor 1 interrupt

Divider (1/128)

Power-on reset

Software reset

Interrupt request

1/8

1/2

CPU clock

f32

fOCO40M

fC4

fC32

fOCO128

fOCO

fOCO-F

fOCO-S

Peripheral

function

clock

1/2

fC2

fOCO-WDT

Low-speed on-chip oscillator

for watchdog timer

CSPRO

CM30

CM13

CM05

XIN

CM03

CM01, CM02, CM03, CM04, CM05, CM06, CM07: Bits in CM0 register

CM10, CM11, CM12, CM13, CM14, CM16, CM17: Bits in CM1 register

CM30: Bit in CM3 register

OCD0, OCD1, OCD2: Bits in OCD register

FRA00, FRA01, FRA03: Bits in FRA0 register

CSPRO: Bit in CSPR register

Oscillation stop detection

Interrupt generation circuit

FRA03 = 1

FRA03 = 0

CM07

CM07 = 0

CM07 = 1

CM05

XCOUT

XCIN

CM12

CM13 = 0

CM13 = 1

CM11

CM02

OCD2 = 1

OCD2 = 0

Divider

1/4

fC-LCD

CM02

CM01

CM04 = 1

CM04 = 0

(Receiver)

(Oscillator)

R5F2L3ACBNFP Datasheet(PDF) 163 Page - Renesas Technology Corp

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