SN8F5708 datasheet(45/204 Pages) SONIX

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SN8F5708 Series

System Clock and Power Management

Datasheet Rev. 2.4



Note: For user develop program in C language or assembly, the first line of the

program “must be set” CLKSEL= 0x07~0x00, CLKMD= 0x69 and then set CKCON=

0x00~0x70, this priority cannot be modified.

System clock rate and program memory extended cycle limitation as follows.

Code Option

CPU Clock Source

Fcpu = CLKSEL[2:0]

IROM Fetch = CKCON[6:4]

IHRC 32M

IHRC 32M with RTC

External Clock (16-32MHz)

Only Support

000 = fosc / 128

001 = fosc / 64

010 = fosc / 32

011 = fosc / 16

100 = fosc / 8

101 = fosc / 4

Support

000 = fcpu / 1 => Recommend!

001 = fcpu / 2

010 = fcpu / 3

011 = fcpu / 4

100 = fcpu / 5

101 = fcpu / 6

110 = fcpu / 7

111 = fcpu / 8

X’tal 12M (Crystal 8-16MHz)

External Clock (8-16MHz)

Only Support

000 = fosc / 128

001 = fosc / 64

010 = fosc / 32

011 = fosc / 16

100 = fosc / 8

101 = fosc / 4

110 = fosc / 2

X’tal 12M (Crystal 4-8MHz)

X’tal 4M (Crystal 1-4MHz)

External Clock (1-8MHz)

Support

000 = fosc / 128

001 = fosc / 64

010 = fosc / 32

011 = fosc / 16

100 = fosc / 8

101 = fosc / 4

110 = fosc / 2

111 = fosc / 1

SN8F5708 Datasheet(PDF) 45 Page - SONiX Technology Company

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