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Code protection
Two priority levels
Power saving Idle and power down modes
64 K external program memory space
64 K external data memory space
Four 8-bit I/O ports
Full-duplex enhanced UART compatible with the stan-
dard 80C51 and the 80C52
GENERAL DESCRIPTION
The single-chip 8-bit microcontroller is manufactured in MXIC's advanced CMOS process. This device uses the
same powerful instruction set, has the same architecture, and is pin-to-pin compatible with the existing 80C51. The
added features make it an even more powerful microcontroller for applications that require clock output, and up/down
counting capabilities such as motor control. It also has a more versatile serial channel that facilitates multi-processor
communications.
PIN CONFIGURATIONS
40 PDIP
44 PLCC
(T2) P1.0
(T2EX) P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
RESET
(RXD) P3.0
(TXD)P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
(WR) P3.6
(RD) P3.7
XTAL2
XTAL1
VSS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
XTAL2
P/N:PM1053
Specifications subject to change without notice, contact your sales representatives for the most update information.
REV. 1.0, DEC. 10, 2003
1
XTAL1
VCC
P0.0 (AD0)
P0.1 (AD1)
P0.2 (AD2)
P0.3 (AD3)
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA
ALE
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
P2.4 (A12)
P2.3 (A11)
P2.2 (A10)
P2.1 (A9)
P2.0 (A8)
VCC
P1.4
P1.3
P1.2
P1.1
P1.0
P0.0
P0.1
P0.2
P1.5
P1.6
P1.7
RST
P3.0
N.C.
P3.1
P3.2
P3.3
P3.4
P3.5
7
6
1
44
P0.3
40
39
P0.4
P0.5
P0.6
P0.7
EA
34
N.C.
ALE
PSEN
P2.7
P2.6
29
28
P2.5
P2.4
MX10FMAX
12
MX10FMAX
17
18
P3.6
P3.7
VSS
23
P2.0
P2.1
P2.2
P2.3
N.C.
N.C.