Rainbow-electronics MAXQ613 Manual do Utilizador descarregar pdf (Página 10)

16-Bit Microcontroller with Infrared Module

MAXQ613

10 _____________________________________________________________________________________

Pin Description (continued)

NAME FUNCTION

BARE DIE

32 TQFN-

EP/LQFP

44 TQFN-

EP/TQFP

RESET PIN

35 28 40 RESET

Digital, Active-Low, Reset Input/Output. The device remains in reset

as long as this pin is low and begins executing from the utility ROM at

address 8000h when this pin returns to a high state. The pin includes

pullup current source; if this pin is driven by an external device, it should

be driven by an open-drain source capable of sinking in excess of 4mA.

This pin can be left unconnected if there is no need to place the device in

a reset state using an external signal. This pin is driven low as an output

when an internal reset condition occurs.

CLOCK PINS

20 18 23 HFXIN

High-Frequency Crystal Input. Connect an external crystal or resona-

tor between HFXIN and HFXOUT for use as the high-frequency system

clock. Alternatively, HFXIN is the input for an external, high-frequency

clock source when HFXOUT is unconnected.

21 19 24 HFXOUT

IR FUNCTION PINS

38 31 43 IRTX

IR Transmit Output. IR transmission pin capable of sinking 25mA. This

pin defaults to a high-impedance input with the weak pullup disabled

during all forms of reset. Software must configure this pin after release

from reset to remove the high-impedance input condition.

39 32 44 IRRX

IR Receive Input. This pin defaults to a high-impedance input with the

weak pullup disabled during all forms of reset. Software must configure

this pin after release from reset to remove the high-impedance input

condition.

GENERAL-PURPOSE I/O AND SPECIAL FUNCTION PINS

Port 0 General-Purpose, Digital I/O Pins. These port pins function as

general-purpose I/O pins with their input and output states controlled by

the PD0, PO0, and PI0 registers. All port pins default to high-impedance

mode after a reset. Software must configure these pins after release

from reset to remove the high-impedance condition. All alternate func-

tions must be enabled from software before they can be used.

GPIO PORT PIN SPECIAL FUNCTION

1 1 1

P0.0/IRTXM/

INT8

P0.0 IR Modulator Output/INT8

2 2 3

P0.1/RX/

INT9

P0.1 USART Receive/INT9

3 3 5

P0.2/TX/

INT10

P0.2 USART Transmit/INT10

4 4 6 P0.3/INT11 P0.3 INT11

5 5 7 P0.4/INT12 P0.4 INT12

6 6 8

P0.5/TBA0/

TBA1/INT13

P0.5

Type B Timer 0 Pin A or Type B

Timer 1 Pin A/INT13

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 28 29

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