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AX2000-1CS896M Datasheet(PDF) 27 Page - Actel Corporation |
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AX2000-1CS896M Datasheet(HTML) 27 Page - Actel Corporation |
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27 / 226 page ![]() Axcelerator Family FPGAs v2.7 2-13 For example, if LVTTL 3.3V (VREF= 1.0V) is used, then the other available (i.e. compatible) I/O standards in the same bank are LVTTL 3.3V PCI/PCI-X, GTL+, and LVPECL. Also note that when multiple I/O standards are used within a bank, the voltage tolerance will be limited to the minimum tolerance of all I/O standards used in the bank. Table 2-13 • Legal I/O Usage Matrix I/O Standard LVTTL 3.3V (VREF=1.0V) ✓ ––– ✓✓ – – ––– ✓ LVTTL 3.3V(VREF=1.5V) ✓ ––– ✓ ––– – ✓ – ✓ LVCMOS 2.5V (VREF=1.0V) – ✓ –––– ✓ –– – ✓ – LVCMOS 2.5V (VREF=1.25V) – ✓ –––––– ✓ – ✓ – LVCMOS1.8V – – ✓ ––––– – – – – LVCMOS1.5V (VREF=1.75V) (JESD8-11) – – – ✓ ––– ✓ ––– – 3.3V PCI/PCI-X (VREF=1.0V) ✓ ––– ✓✓ – – ––– ✓ 3.3V PCI/PCI-X (VREF=1.5V) ✓ ––– ✓ ––– – ✓ – ✓ GTL + (3.3V) ✓ ––– ✓✓ – – ––– ✓ GTL + (2.5V) – ✓ –––– ✓ – ––– – HSTL Class I – – – ✓ ––– ✓ ––– – SSTL2 Class I & II – ✓ –––––– ✓ – ✓ – SSTL3 Class I & II ✓ ––– ✓ ––– – ✓ – ✓ LVDS (VREF=1.0V) – ✓ –––– ✓ –– – ✓ – LVDS (VREF=1.25V) – ✓ –––––– ✓ – ✓ – LVPECL (VREF=1.0V) ✓ ––– ✓✓ – – ––– ✓ LVPECL (VREF=1.5V) ✓ ––– ✓ ––– – ✓ – ✓ Notes: 1. Note that GTL+ 2.5V is not supported across the full military temperature range. 2. A " ✓" indicates whether standards can be used within a bank at the same time. Examples: a) LVTTL can be used with 3.3V PCI and GTL+ (3.3V), when VREF = 1.0V (GTL+ requirement). b) LVTTL can be used with 3.3V PCI and SSTL3 Class I and II, when VREF = 1.5V (SSTL3 requirement). |
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