MAXQ2010-RFX+ datasheet(18/34 Pages) MAXIM

18 / 34 page

16-Bit Mixed-Signal Microcontroller

with LCD Interface

______________________________________________________________________________________

Pin Description (continued)

NAME

FUNCTION

Digital I/O, Type C Port 2; LCD Segment-Driver Output. This port functions as either

bidirectional I/O or alternate LCD segment-drive outputs. The reset condition of the port is with

all bits at logic 1. In this state, a weak pullup holds the port high. This condition serves as an

input mode. The port pins also contain a Schmitt voltage input. Setting the PCF2 bit switches

all pins on this port to LCD segment-drive outputs.

PORT

SPECIAL/ALTERNATE FUNCTION

P2.0

SEG16

P2.1

SEG17

P2.2

SEG18

P2.3

SEG19

P2.4

SEG20

P2.5

SEG21

P2.6

SEG22

56–52,

48–46

P2.0–P2.7;

SEG16–SEG23

P2.7

SEG23

Digital I/O, Type C Port 3; LCD Segment-Driver Output. This port functions as either

bidirectional I/O or alternate LCD segment-drive outputs. The reset condition of the port is with

all bits at logic 1. In this state, a weak pullup holds the port high. This condition serves as an

input mode. The port pins also contain a Schmitt voltage input. Setting the PCF3 bit switches

all pins on this port to LCD segment-drive outputs.

PORT

SPECIAL/ALTERNATE FUNCTION

P3.0

SEG24

P3.1

SEG25

P3.2

SEG26

P3.3

SEG27

P3.4

SEG28

P3.5

SEG29

P3.6

SEG30

36–33, 22–19

P3.0–P3.7;

SEG24–SEG31

P3.7

SEG31

Digital I/O, Type-C Port 4; LCD Segment-Driver Output. This port functions as either

bidirectional I/O or alternate LCD segment-drive outputs. The reset condition of the port is with

all bits at logic 1. In this state, a weak pullup holds the port high. This condition serves as an

input mode. The port pins also contain a Schmitt voltage input. Setting the PCF4 bit switches

all pins on this port to LCD segment-drive outputs.

PORT

SPECIAL/ALTERNATE FUNCTION

P4.0

SEG32

P4.1

SEG33

P4.2

SEG34

P4.3

SEG35

P4.4

SEG36

P4.5

SEG37

P4.6

SEG38

18–11

P4.0–P4.7;

SEG32–SEG39

P4.7

SEG39

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