MAXQ3120
High-Precision ADC
Mixed-Signal Microcontroller
_____________________________________________________________________ 7
Pin Description (continued)
PIN NAME FUNCTION
General-Purpose, Digital, I/O, Type-D Port; External Edge-Selectable Interrupt. These port pins
function as bidirectional I/O pins only. All port pins default to input mode with weak pullups enabled
after a reset. Port pins P0.3, P0.4, and P0.5 can be configured as external interrupt inputs. All alternate
functions must be enabled from software.
PIN PORT ALTERNATE FUNCTIONS
64 P0.0 RTC Square-Wave Output —
65 P0.1 Serial Port 0 Receive —
66 P0.2 Serial Port 0 Transmit —
67 P0.3 Timer 0 Gate Input INT0
68 P0.4 Timer 0 Input INT1
69 P0.5 Timer 1 Input/Output INT2
70 P0.6 Timer 2 Input/Output A (T2P) —
64–71
P0.0–P0.7/
SQW, RXD0,
INT0–INT2/
T0G, T0, T1
Timer 2 Input/Output B (T2PB)
—
G e n e r a l - Pu r p o s e , 8 - B i t , D i g i t a l , I/ O , T y p e - C Po r t ; LC D Se g m e n t - D r iv e r Ou t p u t . These p or t p i ns
functi on as b oth b i d i r ecti onal I/O p i ns and LC D seg m ent- d r i ve outp uts. Al l p or t p i ns d efaul t to i np ut m od e
w i th w eak p ul l up s enab l ed after a r eset. S etti ng the LC D enab l e ( P C Fx) b i t for a g r oup of four p or t p i ns
enab l es the LC D functi on and d i sab l es the g ener al - p ur p ose I/O functi on on al l p i ns i n that g r oup .
PIN PORT LCD SEGMENT LCD ENABLE
76 P1.0 SEG19
77 P1.1 SEG18
78 P1.2 SEG17
79 P1.3 SEG16
PCF1
80 P1.4 SEG15
1 P1.5 SEG14
2 P1.6 SEG13
76–80, 1,
2, 3
P1.0–P1.7/
SEG19–
SEG12
3 P1.7 SEG12
PCF0
G e n e r a l - Pu r p o s e , 8 - B i t , D i g i t a l , I/ O , T y p e - C Po r t ; LC D Se g m e n t - D r iv e r Ou t p u t . These p or t p i ns
functi on as b oth b i d i r ecti onal I/O p i ns and LC D seg m ent- d r i ve outp uts. Al l p or t p i ns d efaul t to i np ut m od e
w i th w eak p ul l up s enab l ed after a r eset. S etti ng the LC D enab l e ( P C Fx) b i t for a g r oup of four p or t p i ns
enab l es the LC D functi on and d i sab l es the g ener al - p ur p ose I/O functi on on al l p i ns i n that g r oup .
PIN PORT LCD SEGMENT LCD ENABLE
28 P2.0 SEG20
29 P2.1 SEG21
30 P2.2 SEG22
31 P2.3 SEG23
PCF2
32 P2.4 SEG24
33 P2.5 SEG25
34 P2.6 SEG26
P2.0–P2.7/
SEG20–
SEG27
39 P2.7 SEG27
PCF3
(18 Seiten)
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