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ATV5000-35UM-883 Datasheet(PDF) 10 Page - ATMEL Corporation |
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ATV5000-35UM-883 Datasheet(HTML) 10 Page - ATMEL Corporation |
10 / 13 page Security Fuse Usage A single fuse is provided to prevent unauthorized copying of the ATV5000 fuse patterns. Once programmed, all outputs appear programmed during verify. The security fuse should be pro- grammed last (after verifying all other programmed bits), as its effect is immediate. The security fuse also inhibits preload and observability. Erasure Characteristics The entire memory array of an ATV5000 is erased after expo- sure to ultraviolet light at a wavelength of 2537 Å. Complete erasure is assured after a minimum of 20 minutes exposure using 12,000 µW/cm 2 intensity lamps spaced one inch away from the chip. Minimum erase time for lamps at other intensity ratings can be calculated from the minimum integrated erasure dose of 15 W•sec/cm 2. To prevent unintentional erasure, an opaque la- bel is recommended to cover the clear window on any UV eras- able PLD which will be subjected to continuous fluorescent in- door lighting or sunlight. ATV5000 PLCC/PGA Pin Assignments PLCC Pin PGA Pin Name PLCC Pin PGA Pin Name PLCC Pin PGA Pin Name PLCC Pin PGA Pin Name 1 B6 IN 18 F2 I/O 35 K6 IN 52 F10 I/O 2 A6 IN 19 F1 I/O 36 L6 IN 53 F11 I/O 3 B5 VCC 20 G2 VCC 37 K7 VCC 54 E10 VCC 4 A5 I/O 21 G1 I/O 38 L7 I/O 55 E11 I/O 5 B4 I/O 22 H2 I/O 39 K8 I/O 56 D10 I/O 6 A4 I/O 23 H1 I/O 40 L8 I/O 57 D11 I/O 7 B3 I/O 24 J2 I/O 41 K9 I/O 58 C10 I/O 8 A3 I/O 25 J1 I/O 42 L9 I/O 59 C11 I/O 9 A2 I/O 26 K1 I/O 43 L10 I/O 60 B11 I/O 10 B2 I/O 27 K2 I/O 44 K10 I/O 61 B10 I/O 11 B1 I/O 28 L2 I/O 45 K11 I/O 62 A10 I/O 12 C2 I/O 29 K3 I/O 46 J10 I/O 63 B9 I/O 13 C1 I/O 30 L3 I/O 47 J11 I/O 64 A9 I/O 14 D2 I/O 31 K4 I/O 48 H10 I/O 65 B8 I/O 15 D1 I/O 32 L4 IN 49 H11 I/O 66 A8 IN 16 E2 GND 33 K5 GND 50 G10 GND 67 B7 GND 17 E1 I/O 34 L5 IN 51 G11 I/O 68 A7 IN Pin Capacitance (f = 1 MHz, T = 25°C) (1) Typ Max Units Conditions CIN 68 pF VIN = 0 V COUT 812 pF VOUT = 0 V Note: 1. Typical values for nominal supply voltage. This parameter is only sampled and is not 100% tested. 1-202 ATV5000/L |
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