mpc82x52a Megawin Technology, mpc82x52a Datasheet - Page 20

• Manufacturer Part Number: mpc82x52a
• Description: 8-bit Micro-controller
• Manufacturer: Megawin Technology

Functional Description
I/O Port Configuration
20
All 15 port pins on MPC82x52A may be independently configured to one of four modes:
quasi-bidirectional (standard 8051 port output), push-pull output, open-drain output or
input-only. All port pins default to quasi-bidirectional after reset. Each port pin has a
Schmitt-triggered input for improved input noise rejection. During power-down, all the
schmitt-triggered inputs are disabled with the exception of P3.2 and P3.3, which may be used
to wake-up the device. Therefore P3.2 and P3.3 should not be left floating during
power-down.
There are several special function registers designed to configure those I/O ports.
SFR: P1M0(P0 Configuration 0)
SFR: P1M1(P0 Configuration 1)
SFR: P3M0(P3 Configuration 0)
SFR: P3M1(P3 Configuration 1)
P1M07
P1M17
P3M07
P3M17
Bit-7
Bit-7
Bit-7
Bit-7
P1M06
P1M16
P3M06
P3M16
Bit-6
Bit-6
Bit-6
Bit-6
P1M05
P1M15
P3M05
P3M15
Bit-5
Bit-5
Bit-5
Bit-5
MPC82x52A Data Sheet
P1M04
P1M14
P3M04
P3M14
Bit-4
Bit-4
Bit-4
Bit-4
P1M03
P1M13
P3M03
P3M13
Bit-3
Bit-3
Bit-3
Bit-3
P1M02
P3M02
P1M12
P3M12
Bit-2
Bit-2
Bit-2
Bit-2
P1M01
P3M01
P1M11
P3M11
Bit-1
Bit-1
Bit-1
Bit-1
MEGAWIN
P1M00
P1M10
P3M00
P3M10
Bit-0
Bit-0
Bit-0
Bit-0