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IDT79RV3081-33FDB Datasheet(PDF) 11 Page - Integrated Device Technology |
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IDT79RV3081-33FDB Datasheet(HTML) 11 Page - Integrated Device Technology |
11 / 38 page 5.5 11 IDT79R3081 RISController MILITARY AND COMMERCIAL TEMPERATURE RANGES PIN NAME I/O DESCRIPTION Int(5:3) I Processor Interrupt: During normal operation, these signals are logically the same as the Int(5:0) SInt(2:0) signals of the R3000. During processor reset, these signals perform mode initialization of the CPU, but in a different (simpler) fashion than the interrupt signals of the R3000. There are two types of interrupt inputs: the SInt inputs are internally synchronized by the processor, and may be driven by an asynchronous external agent. The direct interrupt inputs are not internally synchronized, and thus must be externally synchronized to the CPU. The direct interrupt inputs have one cycle lower latency than the synchronized interrupts. Note that the interrupt used by the on-chip FPA will not be monitored externally. ClkIn I Master Clock Input: This input clock can be provided at the execution frequency of the CPU (1x clock mode) or at twice that frequency (2x clock mode), as selected at reset. Reset I Master Processor Reset: This signal initializes the CPU. Mode selection is performed during the last cycle of Reset. Rsvd(4:1) I/O Reserved: These four signal pins are reserved for testing and for future revisions of this device. Users must not connect these pins. Note that Rsvd(0) of the R3051 is now used for the CohReq input pin. PIN DESCRIPTION (Continued): ABSOLUTE MAXIMUM RATINGS (1, 3) Symbol Rating Commercial Military Unit VTERM Terminal Voltage –0.5 to +7.0 –0.5 to +7.0 V with Respect to GND TC Operating Case 0 to +85 –55 to +125 °C Temperature TBIAS Case Temperature –55 to +125 –65 to +135 °C Under Bias TSTG Storage –55 to +125 –65 to +155 °C Temperature VIN Input Voltage –0.5 to +7.0 –0.5 to +7.0 V NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. VIN minimum = –3.0V for pulse width less than 15ns. VIN should not exceed VCC +0.5V. 3. Not more than one output should be shorted at a time. Duration of the short should not exceed 30 seconds. 2889 tbl 05 OUTPUT LOADING FOR AC TESTING Signal CLD SysClk 50 pf All Others 25 pf 2889 tbl 08 Symbol Parameter Min. Max. Unit VIH Input HIGH Voltage 3.0 — V VIL Input LOW Voltage — 0 V VIHS Input HIGH Voltage 3.0 — V VILS Input LOW Voltage — 0 V 2889 tbl 06 AC TEST CONDITIONS—RV3081 – + To Device Under Test CLD –4mA +4mA VREF +1.5V 2889 drw 08 AC TEST CONDITIONS—R3081 2889 tbl 06 Symbol Parameter Min. Max. Unit VIH Input HIGH Voltage 3.0 — V VIL Input LOW Voltage — 0 V VIHS Input HIGH Voltage 3.5 — V VILS Input LOW Voltage — 0 V 2889 tbl 04 RECOMMENDED OPERATING TEMPERATURE AND SUPPLY VOLTAGE 2889 tbl 07 Grade Temperature(Case) GND VCC Military –55 °C to +125°C 0V 5.0 ±10% Commercial 0 °C to +85°C 0V 5.0 ±5% Commercial 0 °C to +85°C 0V 3.3 ±5% |
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