80960JD datasheet(45/86 Pages) INTEL

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80960JA/JF/JD/JS/JC/JT 3.3 V Embedded 32-Bit Microprocessor

Datasheet

4.7.1

A.C. Test Conditions and Derating Curves

The A.C. Specifications in Section 4.7, “A.C. Specifications” are tested with the 50 pF load

indicated in Figure 10.

Refer to the following sections for the specified derating curves:

• Section 4.7.1.1, “Output Delay or Hold vs. Load Capacitance” on page 46

• Section 4.7.1.2, “TLX vs. AD Bus Load Capacitance” on page 47

Table 23. Note Definitions for Table 22, 80960Jx AC Characteristics

NOTES:

1. Not tested.

2. To ensure a 1:1 relationship between the amplitude of the input jitter and the internal clock, the jitter

frequency spectrum should not have any power peaking between 500 KHz and 1/3 of the CLKIN

frequency.

3. Inactive ALE/ALE# refers to the falling edge of ALE and the rising edge of ALE#. For inactive ALE/ALE#

timings, refer to Relative Output Timings in this table.

4. A float condition occurs when the output current becomes less than IOL. Float delay is not tested, but is

designed to be no longer than the valid delay.

5. AD[31:0] are synchronous inputs. Setup and hold times must be met for proper processor operation. NMI#

and XINT[7:0]# may be synchronous or asynchronous. Meeting setup and hold time guarantees

recognition at a particular clock edge. For asynchronous operation, NMI# and XINT[7:0]# must be asserted

for a minimum of two CLKIN periods to ensure recognition.

6. RDYRCV# and HOLD are synchronous inputs. Setup and hold times must be met for proper processor

operation.

7. RESET# may be synchronous or asynchronous. Meeting setup and hold time guarantees recognition at a

particular clock edge.

8. ONCE# and STEST# must be stable at the rising edge of RESET# for proper operation.

9. Guaranteed by design. May not be 100% tested.

10.Relative to falling edge of TCK.

11. Worst-case TOV condition occurs on I/O pins when pins transition from a floating high input to driving a low

output state. The Address/Data Bus pins encounter this condition between the last access of a read, and

the address cycle of a following write. 5 V signals take 3 ns longer to discharge than 3.3 V signals at 50 pF

loads.

Figure 10. A.C. Test Load

Output Pin

CL = 50 pF for all signals

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