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range and don't use the CAT control with the radio, then the FC-20 is reported to operate
very smoothly and is well integrated with the radio. If these limitations are important to
you should consider the LDG AT-11 autotuner.
Firmware Upgrades
A common question asked regarding the FT100 is whether or not its firmware can be
upgraded to add some missing feature in the future such as memory management via a
PC or keypad frequency entry. Unfortunately, the design of the FT100 does not allow for
this kind of feature since the microcontrollers are not flash-based, but rather OTP (one-
time programmable) devices or even mask-based in later production runs. They can be
removed and replaced, but this takes special SMT (surface mount technology) soldering
equipment.
There are three microcontrollers in the FT100:
•
The FT100's main processor, mounted on the controller unit, is a 32MHz, 80-pin,
16-bit CPU from NEC (P/N UPD78P4038).
•
There is also an 8 MHz, 48-pin, 8-bit microprocessor on the controller unit made
by Fujitsu (P/N MB89P133PFM) that appears to be the one that does the
electronic CW keying since it only has a few inputs and they connect to the 'key1
and key2' on the back of the unit. It uses a few of its serial pins to communicate
with the main CPU. FMI see: the Fujitsu MB89P133PFM datasheet.
•
The display board has a 5 Mhz, 80-pin, 8-bit NEC microprocessor (P/N
UPD78P054) and that communicates with the main CPU via a serial link.
Keypad Frequency Entry
There is no way to key frequencies into the FT100 via the microphone's numeric keypad
(standard on US models). That numeric keypad is only used for touch tone encoding
when the PTT is held. However, John Hansen, W2FS, has designed an auxiliary keypad
called the Millenium QSYer that can be used to enter frequencies from an external
keypad. The cost is US$70 for the kit or US$95 for the assembled and tested unit. It can
also be used with the Yaesu FT817 and Icom IC706 mobile radios.
For details and ordering see http://www.john.hansen.net/keypad.htm
Manual Revisions
The manual revision can be determined by the part number of the manual. This number is
located directly below the barcode on the back cover of the manual and will have a
format like 'E08981003'. The number on the lower left-hand corner of the back cover
with the format such as 9907V-EY is the printing lot number and does not contain
information relevant to the revision of the manual.
Another common question asked is where one can get a copy of the owner's manual,
preferably on line. You can find it on http://k0lee.com/images/FT-100D%20Manual.pdf.
Summary of Contents for FT-100 Micro Mobile
Page 1: ...Yaesu FT 100 undocumented Compiled by PA3GMP Printed 4 April 2004...
Page 10: ...9 ATAS 100 Disassembly...
Page 11: ...10...
Page 12: ...11...
Page 13: ...12...
Page 20: ...19 After the factory mod...
Page 22: ...21 Prior to modification...
Page 23: ...22 Prior to modification...
Page 24: ...23 After modification...
Page 37: ...36...
Page 46: ...45 FT100 menu settings Entry Set to Description Remarks...
Page 47: ...46 FT100 menu settings Entry Set to Description Remarks...
Page 48: ...47 FT100 menu settings Entry Set to Description Remarks...
Page 49: ...48 FT100 menu settings Entry Set to Description Remarks...
Page 50: ...49 FT100 menu settings Entry Set to Description Remarks...
Page 51: ...50 Frequency list Freq Mode Memory Description...
Page 52: ...51 Frequency list Freq Mode Memory Description...
Page 53: ...52 Frequency list Freq Mode Memory Description...
Page 54: ...53 Frequency list Freq Mode Memory Description...
Page 55: ...54 Frequency list Freq Mode Memory Description...