Datasheet

20 Maxim Integrated
16-Bit Microcontrollers with
Infrared Module and Optional USB
MAXQ612/MAXQ622
Pin Descriptions—Bare Die (continued)
PIN
NAME FUNCTION
MAXQ612 MAXQ622
16, 18, 19,
20, 50, 51,
53, 54
16, 18, 19,
20, 50, 51,
53, 54
P2.0–P2.7;
MOSI0,
MISO0,
SCLK0,
SSEL0, TCK,
TDI, TMS,
TDO
General-Purpose, Digital, I/O, Type C Port. These port pins function as bidirec-
tional I/O pins. P2.0 to P2.3 default to three-state mode after a reset. All alternate
functions must be enabled from software. Enabling the pin’s special function dis-
ables the general-purpose I/O on the pin.
The JTAG pins (P2.4 to P2.7) default to their JTAG function with weak pullups
enabled after a reset. The JTAG function can be disabled using the TAP bit in
the SC register.
P2.7 functions as the JTAG test-data output on reset and defaults to an input with
a weak pullup. The output function of the test data is only enabled during the
TAP’s shift_IR or shift_DR states.
MAXQ612 MAXQ622 PORT SPECIAL FUNCTION
16 16 P2.0 MOSI0
18 18 P2.1 MISO0
19 19 P2.2 SCLK0
20 20 P2.3
SSEL0
50 50 P2.4 TCK
51 51 P2.5 TDI
53 53 P2.6 TMS
54 54 P2.7 TDO
33–37, 39,
40, 42
33–40
P3.0–P3.7;
INT8–INT15
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
33 33 P3.0 INT8
34 34 P3.1 INT9
35 35 P3.2 INT10
36 36 P3.3 INT11
37 37 P3.4 INT12
39 38 P3.5 INT13
40 39 P3.6 INT14
42 40 P3.7 INT15
65–72 65–72 P4.0–P4.7
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.
MAXQ612 MAXQ622 PORT SPECIAL FUNCTION
65 65 P4.0 —
66 66 P4.1 —
67 67 P4.2 —
68 68 P4.3 —
69 69 P4.4 —
70 70 P4.5 —
71 71 P4.6 —
72 72 P4.7 —