Nortel Networks MSC8101 ADS User Manual

MOTOROLA

31

Operating Instructions

 summarized available modes. . Default set is JP3-OPEN (DLL disable).

JP3 provides 50 Ohm resistance termination in case when using an external clock source via
coaxial cable connected to the SMB CLOCKIN. In so doing the on-board clock oscillator U18 must
be removed from the socket. Default set is JP3-OPEN (termination disable).

JP4 selects the source for VPP - programming voltage for the Flash SIMM. When a jumper is
located between pins 1 - 2 of JP4 (Factory Set), the VPP is connected to the 5V0 plane of the ADS.
For 12V programming set VPP will be drawn from external power supply 12V connected to pins
JP4/2,3.

Should be taken into consideration that 12V 
external power input for Flash SIMM have 
no protection.

Set for audio measurements. Factory set - JP5,JP8 are OPEN.

Set if using external microphone audio source. Factory set - JP6,JP7 are CLOSE.

JP9 selects the source for CODEC Power Rail. When a jumper is located between pins 1 - 2 of
JP9 (Factory Set), the CODEC feeds from the 5V0 plane of the ADS. When a jumper is removed
external low noise power supply 5V @ 200 mA might be connected to JP9 pins 2,3. See figure
below:

OPEN

OPEN

PLL Mode

DLL disable

CLOSE

CLOSE

Buffer Mode

DLL enable

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Freescale Semiconductor, Inc.

For More Information On This Product,

   Go to: www.freescale.com

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