Rainbow Electronics MAXQ2010 - Manual (Page 18)

MAXQ2010
16-Bit Mixed-Signal Microcontroller with LCD
18 ______________________________________________________________________________________
Pin Description (continued)
PIN 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.
PIN PORT SPECIAL/ALTERNATE FUNCTION
56 P2.0 SEG16
55 P2.1 SEG17
54 P2.2 SEG18
53 P2.3 SEG19
52 P2.4 SEG20
48 P2.5 SEG21
47 P2.6 SEG22
56–52,
48–46
P2.0–P2.7;
SEG16–SEG23
46 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.
PIN PORT SPECIAL/ALTERNATE FUNCTION
36 P3.0 SEG24
35 P3.1 SEG25
34 P3.2 SEG26
33 P3.3 SEG27
22 P3.4 SEG28
21 P3.5 SEG29
20 P3.6 SEG30
36–33, 22–19
P3.0–P3.7;
SEG24–SEG31
19 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.
PIN PORT SPECIAL/ALTERNATE FUNCTION
18 P4.0 SEG32
17 P4.1 SEG33
16 P4.2 SEG34
15 P4.3 SEG35
14 P4.4 SEG36
13 P4.5 SEG37
12 P4.6 SEG38
18–11
P4.0–P4.7;
SEG32–SEG39
11 P4.7 SEG39