Datasheet

19Maxim Integrated
16-Bit Microcontrollers with
Infrared Module and Optional USB
MAXQ612/MAXQ622
Pin Descriptions—Bare Die (continued)
PIN
NAME FUNCTION
MAXQ612 MAXQ622
IR FUNCTION PINS
74 74 IRTX
IR Transmit Output. Active-low IR transmit pin capable of sinking 25mA. This
pin defaults to three-state input with the weak pullup disabled during all forms
of reset. Software must configure this pin after release from reset to remove the
three-state input condition.
75 75 IRRX IR Receive Input
GENERAL-PURPOSE I/O AND SPECIAL FUNCTION PINS
1, 2, 3, 5, 6,
7, 9, 10
1, 2, 3, 5, 6,
7, 9, 10
P0.0–P0.7;
IRTXM, RX0,
TX0, RX1,
TX1, SDA,
SCL, TBA0,
TBA1, TBB0,
TBB1
General-Purpose, Digital, I/O, Type C Port. These port pins function as bidirec-
tional I/O pins. All port pins default to three-state mode after a reset. All alternate
functions must be enabled from software.
MAXQ612 MAXQ622 PORT SPECIAL FUNCTION
1 1 P0.0 IRTXM
2 2 P0.1 RX0
3 3 P0.2 TX0
5 5 P0.3 RX1/SDA
6 6 P0.4 TX1/SCL
7 7 P0.5 TBA0/TBA1
9 9 P0.6 TBB0
10 10 P0.7 TBB1
55, 56, 58–63 55, 56, 58–63
P1.0–P1.7;
INT0–INT7
General-Purpose, Digital, I/O, Type D Port; External Edge-Selectable Interrupt.
These port pins function as bidirectional I/O pins or as interrupts. All port pins
default to three-state mode after a reset. All interrupt functions must be enabled
from software.
MAXQ612 MAXQ622 PORT SPECIAL FUNCTION
55 55 P1.0 INT0
56 56 P1.1 INT1
58 58 P1.2 INT2
59 59 P1.3 INT3
60 60 P1.4 INT4
61 61 P1.5 INT5
62 62 P1.6 INT6
63 63 P1.7 INT7