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Nokia Legacy Phones ( DCT-1 ,2 ,3 ,L ) Nokia Legacy Models Like 1011, 1610, 211x, 2x20, 6050, 3110, 8110, NKxxx , 2100, 3210, 3310, 3330, 3410, 5110, 5210, 5510, 6110, 6150, 6210, 6250, 7110, 8210, 8250, 8850 also 9110 & 9210 |
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01-12-2001, 22:17 | #1 (permalink) |
Insane Poster Join Date: Jan 2001 Location: Ukraine
Posts: 57
Member: 2984 Status: Offline Thanks Meter: 0 | Questions about Dejan's flasher interface I don't understand how work Dejan's flasher interface. On Nokia 5110 logic level "1" = 2.7V (near) and logic level "0" = 0V (near). On Vcc=5V-0.6V=4.4V chip SN74HC14 has logic levels (from datasheet): Vih (High-level input voltage) = 3.15V min; Vil (Low-level input voltage) = 1.35V max; Voh (High-level output voltage) = 3.98V min; Vol (Low-level output voltage) = 0.26V max. And so: 1. What level was on output of 74HC14 when in input was 2.7V ("1" for Nokia) ??? 2. What you say about damaging Nokia's input by logic level of 74HC14 (3.98V min) ??? Please help me understand this. Sasha. |
01-12-2001, 23:10 | #2 (permalink) | |
Freak Poster Join Date: Nov 2000
Posts: 226
Member: 2566 Status: Offline Thanks Meter: 0 | In input is 2.7 output is logix 0 is input is output same as Your vpp of ic at this case +-4,4V. Most logical IC's won't damage so fast. Between the min and max is a "Forbidden" area. The You don't know sure if the output it is logic "1" or Logic "0". the 74HC(t)14 is just an inverter Inp outp 1 0 0 1 Quote:
[This message has been edited by Blu3fish (edited 12 January 2001).] | |
01-13-2001, 21:54 | #3 (permalink) | ||
Insane Poster Join Date: Jan 2001 Location: Ukraine
Posts: 57
Member: 2984 Status: Offline Thanks Meter: 0 | Hi Blu3fish! You say first that "In input is 2.7v output is logix 0" and second say that 2.7v in forbidden zone ??? I don't understand. Sasha. Quote:
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01-13-2001, 22:09 | #4 (permalink) |
Freak Poster Join Date: Jun 2000
Posts: 354
Member: 1623 Status: Offline Thanks Meter: 1 | Hi,To All. 74LS00 : Operating Voltage=4.75 to 5.25 V Minimum Logic 1 input = 2 V Maximum Logic 0 input = 0.8 V Minimum Logic 1 output = 2.7 V Maximum Logic 0 output = 0.5 V Propogation Delay = 9.5 nS Power Per gate = 2 mW 74C00 : Operating Voltage= 3 to 15 V Minimum Logic 1 input = 3.5 V Maximum Logic 0 input = 1.5 V Minimum Logic 1 output = 4.5 V Maximum Logic 0 output = 0.5 V Propogation Delay = 90 nS Power Per gate = 2,5 nW 74HC00 : Operating Voltage= 2 to 6 V Minimum Logic 1 input = 3.15 V Maximum Logic 0 input = 0.9 V Minimum Logic 1 output = 4.4 V Maximum Logic 0 output = 0.1 V Propogation Delay = 23 nS Power Per gate = 0.5 mW at 1 MHz 74HCT00 : Operating Voltage= 4.5 to 5.5 V Minimum Logic 1 input = 2 V Maximum Logic 0 input = 0.8 V Minimum Logic 1 output = 4 V Maximum Logic 0 output = 0.33 V Propogation Delay = 20 nS Power Per gate = ---- I think this may help you.I didn't run flasher in my old Pentium-75 yet. Best Regards... |
01-13-2001, 22:19 | #5 (permalink) |
Freak Poster Join Date: Nov 2000
Posts: 226
Member: 2566 Status: Offline Thanks Meter: 0 | Sorry, I mean Vin 4,4V not 2,7V 4,4>2,7 so the nokia phone will accept it as a "1" Also Check post on other subject. PLZ Next time post it only in one subject. [This message has been edited by Blu3fish (edited 13 January 2001).] |
01-13-2001, 22:34 | #6 (permalink) | |
Insane Poster Join Date: Jan 2001 Location: Ukraine
Posts: 57
Member: 2984 Status: Offline Thanks Meter: 0 | Yes, Nokia will accept 4.4V as log."1". But log."1" on Nokia's Tx output 2,7V and I don't know how will accept it 74HC14 chip. Quote:
[This message has been edited by SashaM (edited 13 January 2001).] | |
01-15-2001, 09:31 | #10 (permalink) |
Guest
Posts: n/a
Member: | NOTE: Hello Boys, i have none externall power, i have power only on LPT port and work only with flas's INTEL, ATMEL, and ST. I have 4 gates to ground connected on IC 74HC14 and other use's. And my problem is with reading AMD flash's ID 000122DA !!! |
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