Pin 17 should be tied high also.
P01 0v0, P02 4v9, P03 0v0, P04 5v0, P05 0v0, P06 5v0, P07 0v0, P08 0v0, P09 0v0, P10 0v2, P11 5v0,
P12 1v7, P13 5v0, P14 3v7, P15 5v0, P16 3v6, P17 5v0, P18 0v0, P19 0v0, P20 5v0, P21 5v0, P22 5v0
You will notice anaemic voltages at the Data Out pins...1.7V is definitely ambiguous in logic terms
---------------
0.0 >A3 | 1 22 | VCC 5.0
0.0 >A2 | 2 21 | >A4 0.0
0.0 >A1 | 3 20 | >RnW 0.0
0.0 >A0 | 4 19 | >nCS1 0.0
0.0 >A5 | 5 18 | >OD 0.0
0.0 >A6 | 6 17 | >CS2 5.0
0.0 >A7 | 7 16 | D3 2.9
0.0 VSS | 8 15 | >D3 5.0
5.0 >D0 | 9 14 | D2 0.0
2.9 D0 | 10 13 | >D2 5.0
5.0 >D1 | 11 12 | D1 2.9
---------------
---------------
0.0 >A3 | 1 22 | VCC 5.0
0.0 >A2 | 2 21 | >A4 0.0
0.0 >A1 | 3 20 | >RnW 5.0
0.0 >A0 | 4 19 | >nCS1 0.0
0.0 >A5 | 5 18 | >OD 0.0
0.0 >A6 | 6 17 | >CS2 5.0
0.0 >A7 | 7 16 | D3 0.0
0.0 VSS | 8 15 | >I3 0.0
0.0 >I0 | 9 14 | D2 0.0
0.0 D0 | 10 13 | >I2 0.0
0.0 >I1 | 11 12 | D1 0.0
---------------
---------------
0.0 >A3 | 1 22 | VCC 5.0
0.0 >A2 | 2 21 | >A4 0.0
0.0 >A1 | 3 20 | >RnW 5.0
5.0 >A0 | 4 19 | >nCS1 0.0
0.0 >A5 | 5 18 | >OD 0.0
0.0 >A6 | 6 17 | >CS2 5.0
0.0 >A7 | 7 16 | D3 2.9
0.0 VSS | 8 15 | >I3 5.0
5.0 >I0 | 9 14 | D2 2.9
2.9 D0 | 10 13 | >I2 5.0
5.0 >I1 | 11 12 | D1 2.9
---------------
Read 0000 ---------------
0.0 >A3 | 1 22 | VCC 5.0
0.0 >A2 | 2 21 | >A4 0.0
0.0 >A1 | 3 20 | >RnW 5.0
0.0 >A0 | 4 19 | >nCS1 0.0
0.0 >A5 | 5 18 | >OD 0.0
0.0 >A6 | 6 17 | >CS2 5.0
0.0 >A7 | 7 16 | D3 0.0
0.0 VSS | 8 15 | >I3 0.0
0.0 >I0 | 9 14 | D2 0.0
0.0 D0 | 10 13 | >I2 0.0
0.0 >I1 | 11 12 | D1 0.0
---------------
Read 0001 ---------------
0.0 >A3 | 1 22 | VCC 5.0
0.0 >A2 | 2 21 | >A4 0.0
0.0 >A1 | 3 20 | >RnW 5.0
5.0 >A0 | 4 19 | >nCS1 0.0
0.0 >A5 | 5 18 | >OD 0.0
0.0 >A6 | 6 17 | >CS2 5.0
0.0 >A7 | 7 16 | D3 2.9
0.0 VSS | 8 15 | >I3 0.0
0.0 >I0 | 9 14 | D2 2.9
2.9 D0 | 10 13 | >I2 0.0
0.0 >I1 | 11 12 | D1 2.9
---------------
Read 0000 ---------------
0.0 >A3 | 1 22 | VCC 5.0
0.0 >A2 | 2 21 | >A4 0.0
0.0 >A1 | 3 20 | >RnW 5.0
0.0 >A0 | 4 19 | >nCS1 0.0
0.0 >A5 | 5 18 | >OD 0.0
0.0 >A6 | 6 17 | >CS2 5.0
0.0 >A7 | 7 16 | D3 0.0
0.0 VSS | 8 15 | >I3 0.0
0.0 >I0 | 9 14 | D2 0.0
0.0 D0 | 10 13 | >I2 0.0
0.0 >I1 | 11 12 | D1 0.0
---------------
So functionally correct but anaemic?
So functionally correct but anaemic?
---------------
0.0 >A3 | 1 22 | VCC 5.0
0.0 >A2 | 2 21 | >A4 0.0
0.0 >A1 | 3 20 | >RnW 5.0
0.0 >A0 | 4 19 | >nCS1 0.0
0.0 >A5 | 5 18 | >OD 0.0
0.0 >A6 | 6 17 | >CS2 5.0
0.0 >A7 | 7 16 | D3 3.5
0.0 VSS | 8 15 | >I3 5.0
5.0 >I0 | 9 14 | D2 3.4
3.7 D0 | 10 13 | >I2 5.0
5.0 >I1 | 11 12 | D1 3.4
---------------
Good ones seem to easily exceed the 2V threshold.What's your supply voltage?