MAXQ7667AACM/V+T【PDF 4/40 页】IC MCU-BASED DAS 16BIT 48-LQFP

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MAXQ7667

16-Bit, RISC, Microcontroller-Based,

Ultrasonic Distance-Measuring System

______________________________________________________________________________________

Pin Description

PIN

NAME

FUNCTION

P1.3/TCK

Port 1 Data 3/JTAG Serial Clock Input. P1.3 is a general-purpose digital I/O. TCK is the JTAG

serial test clock input. Refer to the MAXQ7667 User’s Guide Sections 5 and 11.

P1.4/MOSI

Port 1 Data 4/SPI Serial Data Output. P1.4 is a general-purpose digital I/O. MOSI is the master

output, slave input for the SPI interface. Refer to the MAXQ7667 User’s Guide Sections 5 and 9.

P1.5/MISO

Port 1 Data 5/SPI Serial Data Input. P1.5 is a general-purpose digital I/O. MISO is the master input,

slave output for the SPI interface. Refer to the MAXQ7667 User’s Guide Sections 5 and 9.

P1.6/SCLK

Port 1 Data 6/SPI Serial Clock Output. P1.6 is a general-purpose digital I/O. SCLK is the serial

clock for the SPI interface. SCLK is an input when operating as a slave and an output when

operating as a master. Refer to the MAXQ7667 User’s Guide Sections 5 and 9.

P1.7/SYNC/SS

Port 1 Data 7/Schedule Timer Sync Input/SPI Slave Select. P1.7 is a general-purpose digital I/O.

A rising edge on the SYNC input resets the schedule timer. In SPI slave mode, SS is the SPI

slave-select input. In SPI master mode, use SS or a GPIO to manually select an external slave.

Refer to the MAXQ7667 User’s Guide Sections 5, 7, and 9.

6, 19, 42

DVDD

Digital Supply Voltage. Connect DVDD directly to a +2.5V external source or to REG2P5 output for

single supply operation. Bypass DVDD to DGND with a 0.1F capacitor as close as possible to

the device. Connect all DVDD nodes together.

7, 18, 43

DGND

Digital Ground. Connect all DGND nodes together. Connect to AGND at a single point.

8, 17, 44

DVDDIO

Digital I/O Supply Voltage. DVDDIO powers all digital I/Os except for XIN and XOUT. Bypass

DVDDIO to DGND with a 0.1F capacitor as close as possible to the device. Connect all DVDDIO

nodes together.

P0.0/URX

Port 0 Data 0/UART Receive Data Input. P0.0 is a general-purpose digital I/O. URX is a UART or

LIN data receive input. Refer to the MAXQ7667 User’s Guide Sections 5 and 8.

P0.1/UTX

Port 0 Data 1/UART Transmit Data Output. P0.1 is a general-purpose digital I/O. UTX is a UART or

LIN data transmit output. Refer to the MAXQ7667 User’s Guide Sections 5 and 8.

P0.2/

TXEN

Port 0 Data 2/UART Transmit Output. P0.2 is a general-purpose digital I/O.

TXEN asserts low when

the UART is transmitting. Use

TXEN to enable an external LIN/UART transceiver. Refer to the

MAXQ7667 User’s Guide Sections 5 and 8.

P0.3/T0/

ADCCTL

Port 0 Data 3/Timer 0 I/O/ADC Control Input. P0.3 is a general-purpose digital I/O. T0 is the

primary Type 2 timer/counter 0 output or input. ADCCTL is a sampling/conversion trigger input for

the SAR ADC. Refer to the MAXQ7667 User’s Guide Sections 5, 6, and 14.

P0.4/T0B

Port 0 Data 4/Timer 0B I/O/Comparator Output. P0.4 is a general-purpose digital I/O. T0B is the

secondary Type 2 timer/counter 0 output or input. Refer to the MAXQ7667 User’s Guide Sections

5 and 6.

P0.5/T1

Port 0 Data 5/Timer 1 I/O. P0.5 is a general-purpose digital I/O. T1 is the primary Type 2

timer/counter 1 output or input. Refer to the MAXQ7667 User’s Guide Sections 5 and 6.

P0.6/T2

Port 0 Data 6/Timer 2 I/O. P0.6 is a general-purpose digital I/O. T2 is the primary Type 2

timer/counter 2 output or input. Refer to the MAXQ7667 User’s Guide Sections 5 and 6.

P0.7/T2B

Port 0 Data 7/Timer 2B I/O. P0.7 is a general-purpose digital I/O. T2B is the secondary Type 2

timer/counter 2 output or input. Refer to the MAXQ7667 User’s Guide Sections 5 and 6.

XIN

Crystal Oscillator Input. Connect an external crystal or resonator between XIN and XOUT. When

using an external clock source drive XIN with 2.5V level clock while leaving XOUT unconnected.

Connect XIN to DGND when an external clock source is not used.

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