Convert 25Ch Cordless Ph. To 6M Amateur (Motorola SPI/PLL Help!)
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Hi all, I have a little amateur radio project. Conversion of
25-channel cordless phones to the 6 meter band. After opening
about 20 phones here is what was found: (Base unit modification.)
- Most use the Motorola MC145162 dual 60 MHz PLL. (SMT or DIP)
- Most use a Motorola LSCxxxxxx to control the whole phone.
The idea is to remove the phone's CPU (Motorola LSCx) and replace
it with connection to a BS2, using the SHIFTOUT command to load
new frequency data into the PLL. The phone can be connected to an
amplifier and there you go, a 2-way radio. After about 20 hours
of work the BS2 still will not talk to the PLL using SPI. This PLL
outputs a High signal when it is in the UNlocked state. So far
this is what it always sits at. Most of the required information
for setting up the PLL is visibile on the board: Local OSC freq etc.
- Older phones are using a different PLL: MC145167 (serial input)
which is a pre-programmed version containing 10-channels and an
input bit for handset or base frequency selection... this
chip is easy to talk to with SHIFTOUT 1,1,[noparse][[/noparse]5] and the phone
is transmitting on channel 5. This means you are stuck on
cordless phone frequencies not amateur radio. Not very interesting.
But it worked on the first try.
--
If anyone has information/experience with SPI or these PLL's
please send an email! Thank-you!
=====
William Franzin, VE4VR
wfranzin@h... or
william@f...
BS2-Repeater Controller at: http://www.lwa.mb.ca/ve4gbu/
25-channel cordless phones to the 6 meter band. After opening
about 20 phones here is what was found: (Base unit modification.)
- Most use the Motorola MC145162 dual 60 MHz PLL. (SMT or DIP)
- Most use a Motorola LSCxxxxxx to control the whole phone.
The idea is to remove the phone's CPU (Motorola LSCx) and replace
it with connection to a BS2, using the SHIFTOUT command to load
new frequency data into the PLL. The phone can be connected to an
amplifier and there you go, a 2-way radio. After about 20 hours
of work the BS2 still will not talk to the PLL using SPI. This PLL
outputs a High signal when it is in the UNlocked state. So far
this is what it always sits at. Most of the required information
for setting up the PLL is visibile on the board: Local OSC freq etc.
- Older phones are using a different PLL: MC145167 (serial input)
which is a pre-programmed version containing 10-channels and an
input bit for handset or base frequency selection... this
chip is easy to talk to with SHIFTOUT 1,1,[noparse][[/noparse]5] and the phone
is transmitting on channel 5. This means you are stuck on
cordless phone frequencies not amateur radio. Not very interesting.
But it worked on the first try.
--
If anyone has information/experience with SPI or these PLL's
please send an email! Thank-you!
=====
William Franzin, VE4VR
wfranzin@h... or
william@f...
BS2-Repeater Controller at: http://www.lwa.mb.ca/ve4gbu/
Comments
>Hi all, I have a little amateur radio project. Conversion of
>25-channel cordless phones to the 6 meter band. After opening
>about 20 phones here is what was found: (Base unit modification.)
>
>- Most use the Motorola MC145162 dual 60 MHz PLL. (SMT or DIP)
>- Most use a Motorola LSCxxxxxx to control the whole phone.
>
>The idea is to remove the phone's CPU (Motorola LSCx) and replace
>it with connection to a BS2, using the SHIFTOUT command to load
>new frequency data into the PLL. The phone can be connected to an
>amplifier and there you go, a 2-way radio. After about 20 hours
>of work the BS2 still will not talk to the PLL using SPI. This PLL
>outputs a High signal when it is in the UNlocked state. So far
>this is what it always sits at. Most of the required information
>for setting up the PLL is visibile on the board: Local OSC freq etc.
>
William -
Please be aware that the PBASIC Shiftout command and the inherent structure
of the bit-serial system implemented on the Parallax STAMP proceesor WILL NOT
emulate all of the possible SPI modes. Specifically, any which rely on the
polarity of the clock line, and or the width or duration of the clock pulse.
See Motorola Microprocessor SPI specifications for details.
The details of what the Stamp CAN produce may be found in the Parallax PBASIC
Manual for the Stamp II. See specifically "A single Shiftout instruction
causes
the following sequence of events:" on Page 335, along with the explicit
timing
diagram I-26 (same page).
Please contact me offlist at: bvbates@i... for any additional
information
Hope that helps
Regards,
Bruce
>- Older phones are using a different PLL: MC145167 (serial input)
>which is a pre-programmed version containing 10-channels and an
>input bit for handset or base frequency selection... this
>chip is easy to talk to with SHIFTOUT 1,1,[noparse][[/noparse]5] and the phone
>is transmitting on channel 5. This means you are stuck on
>cordless phone frequencies not amateur radio. Not very interesting.
>But it worked on the first try.
>
>--
>If anyone has information/experience with SPI or these PLL's
>please send an email! Thank-you!
>
>=====
>William Franzin, VE4VR
>wfranzin@h... or
>william@f...
>BS2-Repeater Controller at: http://www.lwa.mb.ca/ve4gbu/
>
>
>
>
>
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