MAXQ3210-EJX MAXIM [Maxim Integrated Products], MAXQ3210-EJX Datasheet - Page 6

• Manufacturer Part Number: MAXQ3210-EJX
• Description: Microcontroller with Internal Voltage Regulator, Piezoelectric Horn Driver, and Comparator
• Manufacturer: MAXIM [Maxim Integrated Products]

Microcontroller with Internal Voltage Regulator,
Piezoelectric Horn Driver, and Comparator
6
PIN
10
11
12
1
2
3
4
5
6
7
8
9
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CMP0/P0.3
T2PB/P0.1
V
TD O/P 1.4
TCK/P1.3
T2P/P0.2
HFXOUT
REF
NAME
HFXIN
GND
P0.0
P1.6
P1.5
/P0.4
Ground
Vo lt a g e R e f e r e n c e In p u t / O u t p u t or G e n e r a l- Pu r p o s e , D i g i t a l I/O , Ty p e D Po r t . Thi s p i n functi ons as ei ther the
outp ut of the i nter nal vol tag e r efer ence or as a b i d i r ecti onal I/O . Thi s p i n can al so b e d r i ven w i th an exter nal
vol tag e to p r ovi d e an op ti onal vol tag e r efer ence. The p i n d efaul ts to a d i g i tal i np ut w i th a w eak p ul l up after a r eset.
Analog Voltage Comparator Output or General-Purpose, Digital I/O, Type D Port. This pin functions as either
the output of the analog voltage comparator or as a bidirectional I/O. The pin defaults to a digital input with a
weak pullup after a reset.
Timer 2 Input/Output or General-Purpose, Digital I/O, Type D Port. This pin functions as either the input or
output of Timer 2 or as a bidirectional I/O. The pin defaults to a digital input with a weak pullup after a reset.
Secondary Timer 2 Input/Output or General-Purpose, Digital I/O, Type D Port. This pin functions as either the
secondary output of Timer 2 or as a bidirectional I/O. The pin defaults to a digital input with a weak pullup after a
reset.
General-Purpose, Digital I/O, Type D Port. This pin functions as a bidirectional I/O, and defaults to a digital
input with a weak pullup after a reset.
General-Purpose, Digital I/O, Type D Port. This pin functions as a bidirectional I/O, and defaults to a digital
input with a weak pullup after a reset.
General-Purpose, Digital I/O, Type D Port. This pin functions as a bidirectional I/O, and defaults to a digital
input with a weak pullup after a reset.
D e b u g Po r t Sig n a l T D O o r G e n e r a l - Pu r p o s e , D i g i t a l I/O , T y p e D Po r t . Thi s p i n functi ons as ei ther the TD O
si g nal of the d eb ug p or t or as a b i d i r ecti onal I/O. The p i n d efaul ts to a d i g i tal i np ut w i th a w eak p ul l up after a r eset.
D e b u g Po r t Sig n a l T C K o r G e n e r a l- Pu r p o s e , D i g it a l I/ O , Ty p e D Po r t . Thi s p i n functi ons as ei ther the TC K
si g nal of the d eb ug p or t or as a b i d i r ecti onal I/O . The p i n d efaul ts to a d i g i tal i np ut w i th a w eak p ul l up after a r eset.
Oscillator Input. Connect an external crystal or resonator between HFXIN and HFXOUT for system clock
generation. When using a crystal, a load capacitor of approximately 22pF must be connected between this pin
and ground. Alternatively, HFXIN is the input for an external clock source when HFXOUT is floating.
O s c i l l a t o r O u t p u t . C onnect an exter nal cr ystal or r esonator b etw een H FX IN and H FX O U T as the system cl ock.
W hen usi ng a cr ystal , a l oad cap aci tor of ap p r oxi m atel y 22p F m ust b e connected b etw een thi s p i n and g r ound .
Al ter nati vel y, fl oat H FX O U T w hen an exter nal hi g h- fr eq uency cl ock sour ce i s connected to the H FX IN p i n.
FUNCTION
Pin Description