TIBPLS506AC

13

× 97 × 8 FIELD-PROGRAMMABLE LOGIC SEQUENCER

SRPS003C – D3090, DECEMBER 1987 – REVISED NOVEMBER 1995

POST OFFICE BOX 655303

9

PARAMETER VALUES FOR TIMING MODEL

tpd(1) = 20 ns

tsu(1) = 12 ns†

tmin(1) = 20 ns

tpd(2) = 10 ns

tsu(2) = 12 ns†

tmin(2) = 20 ns

tpd(3) = 25 ns

tsu(a) = 25 ns

tmin(3) = 25 ns

tsu(b) = 25 ns

tmin(c) = 25 ns

INTERNAL NODE NUMBERS

Q0-Q7

RESET 25-32

P0-P15

SET 33-48

C0

65

RESET 49-64

C1

66

† Use tsu = 20 ns for applications where the setup time for S/R

↓ inputs are required.

diagnostics

A diagnostic mode is provided with these devices that allows the user to inspect the contents of the state

registers. The step-by-step procedures required to use the diagnostics follow.

Step 1.

Disable all outputs by taking pin 17 (OE) high (see Note 4).

Step 2.

Step 3.

Apply appropriate levels of voltage to pins 11 (Q3), 13 (Q4), and 14 (Q5) to select the desired

state register (see Table 1).

The voltage level monitored on pin 9 will indicate the state of the selected state register.

NOTE 4: If pin 17 is being used as an input to the array, then pin 7 (I5) must be taken to VIHH before pin 17 is taken high.

100 ns

100 ns

100 ns

VIHH†

VIH

VOH

VOL

VOHH

VOHH

VOH

VOL

VOH

VOL

I5

Pin 7

OE

Pin 17

Q0

Pin 8

Q1

Pin 9

Q3, Q4, Q5

Pins 11, 13, 14

VOH

VOL

† VIHH = 10.25 V min, 10.5 V nom, 10.75 V max

Figure 2. Diagnostics Waveforms