NC	1  •	28	Vcc
A4	2	27	WE
A5	3	26	CE2
A6	4	25	A3
A7	5	24	A2
A8	6	23	A1
A9	7	22	OE
A10	8	21	A0
A11	9	20	CE 1
A12	10	19	I/O7
I/O0	11	18	I/O6
I/O1	12	17	I/O5
I/O2	13	16	I/O4
GND	14	15	I/O3

Pin	Symbol	Description
1	NC	no connection
2	A4	address input
3	A5	address input
4	A6	address input
5	A7	address input
6	A8	address input
7	A9	address input
8	A10	address input
9	A11	address input
10	A12	address input
11	I/O0	data input/output
12	I/O1	data input/output
13	I/O2	data input/output
14	GND	ground
15	I/O3	data input/output
16	I/O4	data input/output
17	I/O5	data input/output
18	I/O6	data input/output
19	I/O7	data input/output
20	CE 1	chip enable (active low)
21	A0	address input
22	OE	output enable (active low)
23	A1	address input
24	A2	address input
25	A3	address input
26	CE2	chip enable (active high)
27	WE	write enable (active low)
28	Vcc	supply voltage