mpc89x51a Megawin Technology, mpc89x51a Datasheet - Page 5

• Manufacturer Part Number: mpc89x51a
• Description: 8-bit Micro-controller
• Manufacturer: Megawin Technology

Pin Description
Pin Definition
MEGAWIN
P0.0 (AD0)
P0.1 (AD1)
P0.2 (AD2)
P0.3 (AD3)
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
P1.0 (T2)
P1.1 (T2EX)
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P2.0 (A8)
P2.1 (A9)
P2.2 (A10)
P2.3 (A11)
P2.4 (A12)
P2.5 (A13)
P2.6 (A14)
P2.7 (A15)
P3.0 (RXD)
P3.1 (TXD)
P3.2 (INT0)
P3.3 (INT1)
P3.4 (T0)
Pin Name
DIP-40
39
38
37
36
35
34
33
32
21
22
23
24
25
26
27
28
10
11
12
13
14
1
2
3
4
5
6
7
8
Pin Number
PLCC-44
43
42
41
40
39
38
37
36
24
25
26
27
28
29
30
31
11
13
14
15
16
2
3
4
5
6
7
8
9
MPC89x51A Data Sheet
PQFP-44
37
36
35
34
33
32
31
30
40
41
42
43
44
18
19
20
21
22
23
24
25
10
1
2
3
5
7
8
9
Type
BU General-purposed I/O with weak pull-up
BU Port2 is an 8-bits bi-directional I/O port
BU General-purposed I/O with weak pull-up
B
Port0 is an open-drain, bi-directional IO
port. When 1s are written to Port0, they
become high-impedance inputs. Port0 is
also multiplexed with low-order address
or data bus during accesses to external
program and data memory.
resistance inside. When 1s are written
into Port1, the strong output driving
PMOS only turn-on two clock periods
and then the weak pull-up resistance
keep the port high.
P1.0 is also used as one of event
sources for timer2, or output carrier of
timer2, alias T2.
P1.1
interrupt-controlling sources for time2,
alias T2EX.
with pull-up resistance. Except being as
GPIO,
address bytes during accessing to
external program and data memory.
resistance inside. When 1s are written
into Port1, the strong output driving
PMOS only turn-on two clock periods
and then the weak pull-up resistance
is
Port2
also
Description
emits
used
the
as
high-order
one
of
5