Internal Test

Bit

Name

 

 

 

 

 

 

Description

 

 

 

 

 

 

 

 

 

27..28

Reserved

 

 

 

 

 

 

 

 

 

29..31

TSEL2-0

Test selects. Routes internal signals out onto GPIO<27> for observing internal

 

 

clock signals. To observe these clocks, set bit 27 to one in the GAFR and GPDR

 

 

registers and set the TSEL bits to the following settings to select which clock is

 

 

driven onto GP<27>:

 

 

 

 

 

TSEL2

 

TSEL1

 

TSEL0

 

GP<27>(alternate function)

 

 

 

 

 

 

 

0

 

0

 

0

 

32-kHz oscillator

 

 

0

 

0

 

1

 

3.6864-MHz oscillator

 

 

0

 

1

 

0

 

VDD ring oscillator/16

 

 

0

 

1

 

1

 

96-MHz PLL/4

 

 

1

 

0

 

0

 

32-kHz oscillator (also enable rclk on GP<26>

 

 

1

 

0

 

1

 

3.6864-MHz oscillator

 

 

1

 

1

 

0

 

Main PLL/16

 

 

1

 

1

 

1

 

VDDL ring oscillator/4

 

 

 

 

 

 

 

 

 

D-2

SA-1100 Developer’s Manual

Page 386
Image 386
Intel SA-1100 manual TSEL2-0, TSEL2 TSEL1 TSEL0