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With Pod (E1453 "Q" Inputs and Control Outputs)
Setup: 126ns
Hold: -103ns
Latency: 104ns to 125ns
End-if-ready Specifications
Function: The End-if-Ready (EIR) flag may be set in any Subcycle of any Timing Cycle (subject to the
rules governing Timing Cycle length, Pattern Clock timing and Control Output timing). When this flag is
encountered and a Ready condition is indicated via external input(s), then that Timing Cycle will end
after that Subcycle. If a Not Ready indication is given, the cycle continues past the EIR flag. With proper
programming, this allows a DUT to request "wait states" (up to the maximum defined length for that
Timing Cycle) if it is not ready for the next cycle to begin. There is a TTL-compatible Ready coaxial
connector (SMB-type) on the E1450 front panel and another on the E1453 Pod. These inputs have
internal pull-ups, causing a default Ready indication if left open. Pulling either input low signifies Not
Ready. The logic sense of these inputs can be programmatically inverted, and in this case, the unused
input must be grounded before the other will be effective. For the front panel coaxial connector, this is
done by attaching an SMB-type 50
" READY" Input Levels And Loading:
E1450A Front-Panel Coaxial Input
High:> 2.0V (internal pull-up)
Low: < 0.8V at < 250
Capacitance: < 10pF, typical
E1453A Pod Input
High:> 2.0V (internal pull-up)
Low: < 0.8V at < 3.35mA
Capacitance: < 10pF, typical
"READY" Input Timing: The following definitions apply to an EIR flag which is set in a certain Subcycle:
Setup time is how long the specified "Ready" input must be stable before the end of that Subcycle (as
observed at the specified output) in order to ensure the desired operation. Hold time is how long the
input must remain stable after the end of that Subcycle.
E1450 Front-Panel SMB Input/ E1450 "Control" Outputs
Setup: 72ns + 1 Subcycle
Hold: -(58ns + 1 Subcycle)
E1450 Front-Panel SMB Input/ E1453 "Control" Outputs
Setup: 92ns + 1 Subcycle
Hold: -(78ns + 1 Subcycle)
E1453 Input/ E1453A "Control" Outputs
Setup: 104ns + 1 Subcycle
Hold: -(89ns + 1 Subcycle)
A-6 Agilent E1450 Specifications
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Ω
termination or short.
µ
A
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