IC number:	87C54
IC function:	8-bit microcontroller, MCS51 family

Component documentation

IC number	Manufacturer	Documentation
87C54	Intel	MCS51 Web page, MCS51 Microcontroller Family User's Manual (PDF), Datasheet (PDF), Specification update (PDF)

Device versions

IC number	Package	ROM size	RAM size
P87C54	40-pin Plastic DIP	16k bytes	256 bytes

Programmed components

IC number	CBM part number	CBM part description	Chip description
87C54	391747-02		CD V3.1 (C)(M)1993 N.V. Philips, Commodore

Positions

Device	Position	Package	Software
		DIP	391747-02

Pinout

Pin	Type	Name
1	I/O	P1.0 (T2)
2	I/O	P1.1 (T2EX)
3	I/O	P1.2
4	I/O	P1.3
5	I/O	P1.4
6	I/O	P1.5
7	I/O	P1.6
8	I/O	P1.7
9	Input	RESET
10	I/O	P3.0 (RXD)
11	I/O	P3.1 (TXD)
12	I/O	P3.2 (INT0_)
13	I/O	P3.3 (INT1_)
14	I/O	P3.4 (T0)
15	I/O	P3.5 (T1)
16	I/O	P3.6 (WR_)
17	I/O	P3.7 (RD_)
18	Output	XTAL2
19	Input	XTAL1
20	Power	VSS
21	I/O	P2.0 (A8)
22	I/O	P2.1 (A9)
23	I/O	P2.2 (A10)
24	I/O	P2.3 (A11)
25	I/O	P2.4 (A12)
26	I/O	P2.5 (A13)
27	I/O	P2.6 (A14)
28	I/O	P2.7 (A15)
29	Output	PSEN_
30	Input	ALE/PROG_
31	Input	EA_/VPP
32	I/O	P0.0 (AD0)
33	I/O	P0.1 (AD1)
34	I/O	P0.2 (AD2)
35	I/O	P0.3 (AD3)
36	I/O	P0.4 (AD4)
37	I/O	P0.5 (AD5)
38	I/O	P0.6 (AD6)
39	I/O	P0.7 (AD7)
40	Power	VCC