Megawin Technology Co., Ltd.
4.0 Pin description
Pin Number
Pin Name
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
DIP-40
39
38
37
36
35
34
33
32
1
2
3
4
5
6
7
8
PLCC-44
43
42
41
40
39
38
37
36
2
3
4
5
6
7
8
9
PQFP-44
37
36
35
34
33
32
31
30
40
41
42
43
44
1
2
3
Type
MG87FE/L52
Description
I/O 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.
I/O Port 1 is an 8-bit bidirectional I/O port
with internal pull-ups and can be used
as inputs. Port 1 pins that have 1s
written to them are pulled high by the
internal pull-ups and can be used as
inputs. As inputs, port 1 pins that are
externally pulled low will source current
because of the internal pull-ups.
P1.0 is also used as one of event
sources for timer2, or output carrier of
timer2, alias T2.
P1.1
is
also
used
as
one
of
interrupt-controlling sources for timer2,
alias T2EX.
P2.0 (A8)
P2.1 (A9)
P2.2 (A10)
P2.3 (A11)
P2.4 (A12)
P2.5 (A13)
P2.6 (A14)
P2.7 (A15)
21
22
23
24
25
26
27
28
24
25
26
27
28
29
30
31
18
19
20
21
22
23
24
25
I/O Port 2 is an 8-bit bidirectional I/O port
with internal pull-ups and can be used
as inputs. Port 2 pins that have 1s
written to them are pulled high by the
internal pull-ups and can be used as
inputs. As inputs, port 2 pins that are
externally pulled low will source current
because of the internal pull-ups.
Except being as GPIO, Port2 emits the
high-order address bytes during
accessing to external program and
data memory.
Preliminary
ver 1.3
Date: 2009-JAN-20
4
MEGAWIN [ MEGAWIN TECHNOLOGY CO., LTD ]
