Texas Instruments MSP430G2231, User Manual

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MSP430G2231-Q1
SLAS787B – NOVEMBER 2011 – REVISED MARCH 2014 www.ti.com
7.3 Terminal Functions
Table 2. Terminal Functions
TERMINAL
NO. I/O DESCRIPTION
NAME
PW RSA
P1.0/ General-purpose digital I/O pin
TA0CLK/ Timer0_A, clock signal TACLK input
2 1 I/O
ACLK/ ACLK signal output
A0 ADC10 analog input A0
P1.1/ General-purpose digital I/O pin
TA0.0/ 3 2 I/O Timer0_A, capture: CCI0A input, compare: Out0 output
A1 ADC10 analog input A1
P1.2/ General-purpose digital I/O pin
TA0.1/ 4 3 I/O Timer0_A, capture: CCI1A input, compare: Out1 output
A2 ADC10 analog input A2
P1.3/ General-purpose digital I/O pin
ADC10CLK/ ADC10, conversion clock output
5 4 I/O
A3/ ADC10 analog input A3
VREF-/VEREF ADC10 negative reference voltage
P1.4/ General-purpose digital I/O pin
SMCLK/ SMCLK signal output
A4/ 6 5 I/O ADC10 analog input A4
VREF+/VEREF+/ ADC10 positive reference voltage
TCK JTAG test clock, input terminal for device programming and test
P1.5/ General-purpose digital I/O pin
TA0.0/ Timer0_A, compare: Out0 output
A5/ 7 6 I/O ADC10 analog input A5
SCLK/ USI: clock input in I2C mode; clock input/output in SPI mode
TMS JTAG test mode select, input terminal for device programming and test
P1.6/ General-purpose digital I/O pin
TA0.1/ Timer0_A, capture: CCI1A input, compare: Out1 output
A6/ ADC10 analog input A6
8 7 I/O
SDO/ USI: Data output in SPI mode
SCL/ USI: I2C clock in I2C mode
TDI/TCLK JTAG test data input or test clock input during programming and test
P1.7/ General-purpose digital I/O pin
A7/ ADC10 analog input A7
SDI/ 9 8 I/O USI: Data input in SPI mode
SDA/ USI: I2C data in I2C mode
TDO/TDI
(1)
JTAG test data output terminal or test data input during programming and test
XIN/ Input terminal of crystal oscillator
P2.6/ 13 12 I/O General-purpose digital I/O pin
TA0.1 Timer0_A, compare: Out1 output
XOUT/ Output terminal of crystal oscillator
(2)
12 11 I/O
P2.7 General-purpose digital I/O pin
RST/ Reset
NMI/ 10 9 I Nonmaskable interrupt input
SBWTDIO Spy-Bi-Wire test data input/output during programming and test
TEST/ Selects test mode for JTAG pins on Port 1. The device protection fuse is connected to TEST.
11 10 I
SBWTCK Spy-Bi-Wire test clock input during programming and test
DVCC 1 15, 16 NA Supply voltage
DVSS 14 13, 14 NA Ground reference
QFN Pad - Pad NA QFN package pad connection to V
SS
recommended.
(1) TDO or TDI is selected via JTAG instruction.
(2) If XOUT/P2.7 is used as an input, excess current flows until P2SEL.7 is cleared. This is due to the oscillator output driver connection to
this pad after reset.
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