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SPEAR300 数据表(PDF) 54 Page - STMicroelectronics |
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SPEAR300 数据表(HTML) 54 Page - STMicroelectronics |
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54 / 83 page ![]() Electrical characteristics SPEAr300 54/83 Doc ID 16324 Rev 2 5.5 3.3V I/O characteristics The 3.3 V I/Os are compliant with JEDEC standard JESD8b 5.6 LPDDR and DDR2 pin characteristics Table 19. Low voltage TTL DC input specification (3 V< VDD <3.6 V) Symbol Parameter Min Max Unit VIL Low level input voltage 0.8 V VIH High level input voltage 2 V Vhyst Schmitt trigger hysteresis 300 800 mV Table 20. Low voltage TTL DC output specification (3 V< VDD <3.6 V) Symbol Parameter Test condition Min Max Unit VOL Low level output voltage IOL= X mA (1) 1. For the max current value (X mA) refer to Section 2.29: 8-channel ADC. 0.3 V VOH High level output voltage IOH= -X mA (1) VDD - 0.3 V Table 21. Pull-up and pull-down characteristics Symbol Parameter Test condition Min Max Unit RPU Equivalent pull-up resistance VI = 0 V 29 67 k RPD Equivalent pull-down resistance VI = VDDE3V3 29 103 k Table 22. DC characteristics Symbol Parameter Test condition Min Max Unit VIL Low level input voltage SSTL2 -0.3 VREF-0.15 V SSTL18 -0.3 VREF-0.125 V VIH High level input voltage SSTL2 VREF+0.15 VDDE2V5+0.3 V SSTL18 VREF+0.125 VDDE1V8+0.3 V Vhyst Input voltage hysteresis 200 mV Table 23. Driver characteristics Symbol Parameter Min Typ Max Unit RO Output impedance (strong value) 40.5 45 49.5 Output impedance (weak value) 44.1 49 53.9 |
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