DSP16410C View Datasheet(PDF) - Agere -> LSI Corporation

Part Name

Description

Manufacturer

DSP16410C

Digital Signal Processor

Agere -> LSI Corporation 

DSP16410C Digital Signal Processor

Data Addendum

May 2001

8 Timing Characteristics and Requirements

Timing characteristics refer to the behavior of the device under specified conditions. Timing requirements refer to

conditions imposed on the user for proper operation of the device. All timing data is valid for the following condi-

tions:

TJ = –40 °C to +120 °C (See Section 6.3, on page 14).

VDD2 = 3.3 V ± 0.3 V, VSS = 0 V (See Section 6.3, on page 14).

Capacitance load on outputs (CL) = 30 pF.

Output characteristics can be derated as a function of load capacitance (CL).

All outputs: 0.025 ns/pF ≤ dt/dCL ≤ 0.07 ns/pF for 10 ≤ CL ≤ 100 pF.

For example, if the actual load capacitance on an output pin is 20 pF instead of 30 pF, the maximum derating for a

rising edge is (20 – 30) pF x 0.07 ns/pF = 0.7 ns less than the specified rise time or delay that includes a rise time.

The minimum derating for the same 20 pF load would be (20 – 30) pF x 0.025 ns/pF = 0.25 ns.

Test conditions for inputs:

s Rise and fall times of 4 ns or less.

s Timing reference levels for CKI, RSTN, TRST0N, TRST1N, TCK0, and TCK1 are VIH and VIL.

s Timing reference level for all other inputs is VM. (See Table 11.)

s Test conditions for outputs (unless noted otherwise):

s CLOAD = 30 pF.

s Timing reference levels for ECKO are VOH and VOL.

s Timing reference level for all other outputs is VM.

s 3-state delays measured to the high-impedance state of the output driver.

Unless otherwise noted, ECKO in the timing diagrams is the free-running CLK (ECON1[1:0] = 1).

VM –

5-8215 (F)

Figure 8. Reference Voltage Level for Timing Characteristics and Requirements for Inputs and Outputs

Table 11. Reference Voltage Level for Timing Characteristics and Requirements for Inputs and Outputs

Abbreviated Reference

Parameter

Value

Unit

VM

Reference Voltage Level for Timing Characteristics

1.5

V

and Requirements for Inputs and Outputs

24

Agere Systems Inc.

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