WWHAT IS THE FREQUENCIES OF THE CRYSTAL OSILLATORS

[yar]

HI friends

I have afax motherboard I don't know the processor & the ROM the
IC"S as followin

***(M27C4001-6XFI 5880K 9935G SINGAPORE)(THE EPROM)

***(CONEXANT 10485-11 TH1332.9 9930)

***(RFX144V24-S R6675-55 RO0CKWELL97 98 B66530-3 MEXICO )

***(SEC KOREA 943 KM29W04QAT R7H052GD)

***(PFVIM66395M1 942102 JAPAN)



I DON'T KNOW THE FREQUENCIES OF THE CRYSTAL OSILLATORS I FIND THIS
NUMBER (53.76R9K)ON THE BODY OF ONE CRYSTAL THE SECOND ONEIS
CYLINDERICAL SHAPE& HAS THIS CODE(9XMU) THE LAST ONE IS VERY SMALL
CYLINDERICAL SHAPE WITHOUT ANY CODES OR NUMBERS

ANY HELP THANK YOU FOR ALL
I AM SORRY FOR MY HARD LANGUAGE LEVEL

 

[Tim Wescott]

yar wrote:

HI friends

I have afax motherboard I don't know the processor & the ROM the
IC"S as followin

***(M27C4001-6XFI 5880K 9935G SINGAPORE)(THE EPROM)

***(CONEXANT 10485-11 TH1332.9 9930)

***(RFX144V24-S R6675-55 RO0CKWELL97 98 B66530-3 MEXICO )

***(SEC KOREA 943 KM29W04QAT R7H052GD)

***(PFVIM66395M1 942102 JAPAN)



I DON'T KNOW THE FREQUENCIES OF THE CRYSTAL OSILLATORS I FIND THIS
NUMBER (53.76R9K)ON THE BODY OF ONE CRYSTAL THE SECOND ONEIS
CYLINDERICAL SHAPE& HAS THIS CODE(9XMU) THE LAST ONE IS VERY SMALL
CYLINDERICAL SHAPE WITHOUT ANY CODES OR NUMBERS

ANY HELP THANK YOU FOR ALL
I AM SORRY FOR MY HARD LANGUAGE LEVEL

Please don't shout. If your caps lock key is broken please get a new
keyboard.

The small cylindrical crystal is probably 32768Hz, and possibly the
larger one as well.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

 

[Franc Zabkar]

On 17 Sep 2004 09:18:06 -0700, st_yar@yahoo.com (yar) put finger to
keyboard and composed:

HI friends

I have afax motherboard I don't know the processor & the ROM the
IC"S as followin

I don't believe any of the following devices are CPUs. Look for an
FC100 or FC200 device, maybe on the underside of the PCB (?)

***(M27C4001-6XFI 5880K 9935G SINGAPORE)(THE EPROM)

ST Microelectronics 4Mbit EPROM

This would contain the operational firmware.

***(CONEXANT 10485-11 TH1332.9 9930)

Smart DAA? Phone line interface?

***(RFX144V24-S R6675-55 RO0CKWELL97 98 B66530-3 MEXICO )

Conexant Monofax faxmodem with speakerphone and digital answering
machine capability.

http://www.conexant.com/servlets/DownloadServlet/100082A.pdf?FileId=315
http://www.conexant.com/servlets/DownloadServlet/100318b_pb.pdf?FileId=110

***(SEC KOREA 943 KM29W04QAT R7H052GD)

Samsung KM29W040AT 4Mbit flash memory:
http://www.samsung.com/Products/Semiconductor/Flash/NAND/4Mbit/K9F4008W0A/K9F4008W0A.PDF

I suspect this part provides 24 minutes of voice storage, as stated in
Conexant's Monofax datasheet.

***(PFVIM66395M1 942102 JAPAN)

Panasonic CMOS gate array???

I DON'T KNOW THE FREQUENCIES OF THE CRYSTAL OSILLATORS I FIND THIS
NUMBER (53.76R9K)ON THE BODY OF ONE CRYSTAL THE SECOND ONEIS
CYLINDERICAL SHAPE& HAS THIS CODE(9XMU) THE LAST ONE IS VERY SMALL
CYLINDERICAL SHAPE WITHOUT ANY CODES OR NUMBERS

ANY HELP THANK YOU FOR ALL
I AM SORRY FOR MY HARD LANGUAGE LEVEL

The FC100/200(M) controller/CPU requires a 32.768kHz RTC crystal. That
would be the very small (2mm dia?) cylinder.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.