
Lucent |
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TechnologiesInc. |
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4 |
3
2
1
A
Sufficient grounding must be implemented on the board to ensure proper functionality. A
CONNECTOR CENT36
J1
19 | 1 | nSTROBE |
20 | 2 | Data_0 |
21 | 3 | Data_1 |
22 | 4 | Data_2 |
23 | 5 | Data_3 |
24 | 6 | Data_4 |
25 | 7 | Data_5 |
26 | 8 | Data_6 |
27 | 9 | Data_7 |
2810 nACK
2911 BUSY
3012 PError
3113 SELECT
3214 nAUTOFD
3315
3416
3517
3618PLH
nSELECTIN
nFAULT
nINIT
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| B |
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| C |
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| D |
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| VCC_5V |
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| VCC |
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| U? |
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| D1 |
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| 8 | VCC |
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| CS | 1 |
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| DIODE |
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| U1 |
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| 7 |
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| nc |
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| SK |
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| LT1121CST_3.3 |
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| 5V_pullup |
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| 6 | nc |
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| DI | 3 |
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| VCC | 3 | VOUT | VIN | 1 |
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| 5 | GND |
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| DO | 4 |
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| GND |
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| R1 | R2 | R3 | R4 | R5 | R6 | R7 |
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| 93CS56 |
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| VCC | C1 |
| C2 + |
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| 3.3ufd tant. |
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| 3.3ufd tant. |
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| R8 |
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| 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 |
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| C3 | C4 |
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| .1ufd | .1ufd |
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| D0 | nSTROBE HLH PLH | Suspend GND VCC nUSB Reset DIO | CS SK |
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PLH |
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| 1 | D1 |
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| tst_rst | 33 |
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| 24 | Data_0 | VDD_5V |
| D2 |
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| reset |
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| VDD_5V |
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| test |
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| R12 | 1 | 2 | 24 | Data_1 |
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| 30 | VCC |
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| GND | 24 | 2 |
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| R14 | 1 | 2 | 24 |
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| U2 | VCC | 29 | 1 |
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| R15 | 1 | 2 | 24 | Data_3 |
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| GND |
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| R17 | 1 | 2 | 24 | Data_4 |
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| R18 | 1 | 2 | 24 | Data_5 |
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| R19 | 1 | 2 | 24 | Data_6 |
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| R20 | 1 | 2 | 24 | Data_7 |
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| nACK | VCC |
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| BUSY |
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| nINIT nACK BUSY | VCC GND PEerror SELECT nFAULT | LOCLK HICLK | QUAD_44_p | 2 |
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| R21 | 1 | 2 | 24 | nSTROBE |
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| R22 | 1 | 2 | 24 | nAUTOFD |
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| R23 | 1 | 2 | 24 | nSELECTIN |
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| R24 | 1 | 2 | 24 | nINIT |
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| Standard decoupling should be used on the |
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| board. 0.1ufd capacitors between VCC_5V, VCC, |
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| and GND placed as close as possible to the |
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R33 | R32 | R31 | R30 | R29 | R28 | R27 | R26 | R25 |
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| EEPROM | power pins on the |
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| 5V_pullup |
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| ASIC BYPASS |
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| CRYSTAL |
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| 1 |
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| Boise, Idaho |
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| Evaluation Kit is for reference only. |
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| It’s suitability for use for any |
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| particular purpose is not warrented by |
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| USB to Parallel 1284 |
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| Lucent or |
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| Size | Document Number |
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| Rev |
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| B | {Doc} |
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| Copywrite 1997, 1998, |
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| Date: | Wednesday, June 24, 1998 |
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| Sheet | 1 |
| of | 1 |
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B |
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| D |
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Figure 1. USS-720 Evaluation Kit Schematic
Application Note February 1999
Bridging USB to | Typical Circuit Showing |
Parallel | the USS |
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