The I/O pins of the chip are assigned the following signals. The pin number is the number of the I/O pin in the fabricated chip. On all multibit signals, bit 0 is the least significant.

Pin no.	I/O	Signal name	Bit no.
1	O	output	5
2	O	output	6
3	O	output	7
4	O	output	8
5	I	Vdd
6	I	hiloout
7	O	resetPL
8		unused
9	O	carryin
10	I	GND
11	O	finish
12	O	StBit	0
13	O	StBit	1
14	O	StBit	2
15	I	Vdd
16	I	data input	0
17	I	data input	1
18	I	data input	2
19	I	data input	3
20	I	data input	4
21	I	data input	5
22	I	data input	6
23	I	data input	7
24	I	data input	8
25	I	GND
26	I	restart
27	I	start
28	I	readyB
29	I	clka
30	I	Vdd
31	I	clkb
32		unused
33		unused
34		unused
35	I	GND
36	O	output	0
37	O	output	1
38	O	output	2
39	O	output	3
40	O	output	4