¡ Semiconductor
MSM7617 Evaluation Board
9
Component Descriptions (4/8)
Component Number
Component Name
Description
SYNC, CLK
SEL
JP14
This jumper is not used because the SYNC and SCK generator are used only
by Oki Electric for test and are not mounted on the board. It should be left
open.
Jumper pins for switching the SYNC and SCK generator's basic clock oscillator circuit.
128K SEL
JP15
JP16
JP17
JP18
These jumpers are not used because the SYNC and SCK generator are used only
by Oki Electric for test and are not mounted on the board. They all should
be left open.
Jumper pins for switching the SYNC and SCK generator's basic clock frequency.
Based on this setting, the SYNC and SCK generator will output SYNC = 8 kHz
and SCK = 128 kHz. Both SYNC and SCK are 50% duty waveforms.
INT. SYNC
SEL
JP19
Jumper pins for switching the SYNC signal when INT SYNC is being used.
The SYNC and SCK generator is used only by Oki Electric for test, so it has not
been mounted on the board.
OSC mode is not used.
X'tal mode:
The Y2 (crystal resonator) oscillator circuit will be
used for the internal SYNC and SCK generator's
basic clock.
OSC mode:
The OSC2 (crystal oscillator) will be used for the
internal SYNC and SCK generator's basic clock.
Select OSC2 or Y2 oscillation frequency from the
following four possibilities, and set the jumper
corresponding to that frequency.
JP18 : 32.768 MHz
JP17 : 16.384 MHz
JP16 : 8.192 MHz
JP15 : 4.096 MHz
SYNCO mode:
The internal SYNC output by MSM7617 (SCKO) will
be used.
OSC mode:
The SYNC output by the SYNC and SCK generator will
be used.
128K SEL
JP18
JP17
JP16
JP15
JP14
X'tal/OSC2
SYNC
CLK
JP14
X'tal/OSC2
SYNC
CLK
INT.SYNC
SYNCO/OSC
JP19
INT.SYNC
SYNCO/OSC
JP19