2 Pin Descriptions

The descriptions of the pins are listed in Table 2-1.

Table 2-1. Pin Function Table
Name	28-Lead PDIP	32-Lead PLCC	28-Lead SOIC	Function
DC	—	1	—	Don’t Connect
NC	1	2	1	No Connect
A12	2	3	2	Address
A7	3	4	3	Address
A6	4	5	4	Address
A5	5	6	5	Address
A4	6	7	6	Address
A3	7	8	7	Address
A2	8	9	8	Address
A1	9	10	9	Address
A0	10	11	10	Address
NC	—	12	—	No Connect
I/O0	11	13	11	Data Input/Output
I/O1	12	14	12	Data Input/Output
I/O2	13	15	13	Data Input/Output
GND	14	16	14	Ground
DC	—	17	—	Don’t Connect
I/O3	15	18	15	Data Input/Output
I/O4	16	19	16	Data Input/Output
I/O5	17	20	17	Data Input/Output
I/O6	18	21	18	Data Input/Output
I/O7	19	22	19	Data Input/Output
CE	20	23	20	Chip Enable
A10	21	24	21	Address
OE	22	25	22	Output Enable
NC	—	26	—	No Connect
A11	23	27	23	Address
A9	24	28	24	Address
A8	25	29	25	Address
NC	26	30	26	No Connect
WE	27	31	27	Write Enable
V_CC	28	32	28	Device Power Supply