NXP Semiconductors
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
5. Pinning information
5.1 Pinning
P1.4/SS/CEX1
P1.3/CEX0
P1.1/T2EX
43 P0.0/AD0
42 P0.1/AD1
41 P0.2/AD2
P1.5/MOSI/CEX2
P1.6/MISO/CEX3
P1.7/SPICLK/CEX4
7
8
9
40 P0.3/AD3
39 P0.4/AD4
38 P0.5/AD5
37 P0.6/AD6
36 P0.7/AD7
35 EA
34 n.c.
33 ALE/PROG
32 PSEN
31 P2.7/A15
30 P2.6/A14
29 P2.5/A13
P2.4/A12 28
002aaa810
P1.2/ECI
P1.0/T2
2
V
SS
22
RST 10
P3.0/RXD 11
n.c. 12
P3.1/TXD 13
P3.2/INT0 14
P3.3/INT1 15
P3.4/T0 16
P3.5/T1 17
P3.6/WR 18
P3.7/RD 19
XTAL2 20
XTAL1 21
n.c. 23
P2.0/A8 24
P2.1/A9 25
P2.2/A10 26
P2.3/A11 27
P89V51RB2FA
P89V51RC2FA
P89V51RD2FA
Fig 2. PLCC44 pin configuration
P89V51RB2_RC2_RD2_5
44 V
DD
6
5
4
3
1
n.c.
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 05 — 12 November 2009
4 of 80
PHILIPS [ NXP SEMICONDUCTORS ]
