INPUT

(In)

PRESENT STATE

(PS)

NEXT STATE

(NS)

OUT

(Qn)

INPUT

(In)

PRESENT STATE

(PS)

NEXT STATE

(NS)

OUT

(Qn)

TIB82S167BC

14

× 48 × 6 FIELD-PROGRAMMABLE LOGIC SEQUENCER

WITH 3-STATE OUTPUTS OR PRESET

SRPS026A – D2896, JANUARY 1985 – REVISED NOVEMBER 1995

POST OFFICE BOX 655303

7

test array

A test array that consists of product lines 48 and 49 has been added to these devices to allow testing prior to

programming. The test array is factory programmed as shown in Table 1. Testing is accomplished by connecting

Q0 – Q3 to I10 – I13, PRE/OE to GND, and applying the proper input signals as shown in Figure 2. Product lines

48 and 49 must be deleted during user programming to avoid interference with the programmed logic function.

Table 1. Test Array Program

OPTION PRE/OE

H

AND

OR

PRODUCT

LINE

C C 1

1

1

1

1

1

5

4

3

2

1

0

9

8

7

6

5

4

3

2

1

0

5

4

3

2

1

0

5

4

3

2

1

0

7

6

5

4

3

2

1

0

48

X – H H H H H H H H H H H H H H H H H H H H H H L

L

L

L

L

L

L

L

L

L

L

L

L

L

49

– X L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L H H H H H H H H H H H H H H

tsu

th

tw

I0 – I9

VIH

VIL

VOL

0 V

5 V

VIH

VIL

VOH

CLK

Q0 – Q3

P0 – P7

Internal

State Register

tpd

LOW

HIGH

tpd

tpd

VCC

Figure 2. Test Array Waveforms

Table 2. Test Array Deleted

OPTION PRE/OE

H

AND

OR

PRODUCT

LINE

C C 1

1

1

1

1

1

5

4

3

2

1

0

9

8

7

6

5

4

3

2

1

0

5

4

3

2

1

0

5

4

3

2

1

0

7

6

5

4

3

2

1

0

48

–

– H H H H H H H H H H H H H H H H H H H H H H –

–

–

–

–

–

–

–

–

–

–

–

–

–

49

– X L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

L

–

–

–

–

–

–

–

–

–

–

–

–

–

–

X = Fuse intact, – = Fuse blown