Datasheet

MSP430F20x3
MSP430F20x2
MSP430F20x1
www.ti.com SLAS491I –AUGUST 2005–REVISED DECEMBER 2012
Table 29. Port P1 (P1.4 to P1.7) Pin Functions, MSP430F20x3
CONTROL BITS / SIGNALS
(1)(2)
PIN NAME (P1.x) x FUNCTION
P1DIR.x P1SEL.x USIP.x SD16AE.x INCHx JTAG Mode
P1.4
(3)
input/output 0/1 0 N/A 0 N/A 0
N/A 0 1 N/A 0 N/A 0
P1.4/SMCLK/A2+/TCK 4 SMCLK 1 1 N/A 0 N/A 0
A2+
(4)
X X N/A 1 2 0
TCK
(5)
X X N/A X X 1
P1.5
(3)
input/output 0/1 0 0 0 N/A 0
N/A 0 1 0 0 N/A 0
Timer_A2.TA0 1 1 0 0 N/A 0
P1.5/TA0/SCLK/A2-/TMS 5
SCLK X X 1 0 N/A 0
A2-
(4)(6)
X X X 1 2 0
TMS
(5)
X X X X X 1
P1.6
(3)
input/output 0/1 0 0 0 N/A 0
Timer_A2.CCI1B 0 1 0 0 N/A 0
Timer_A2.TA1 1 1 0 0 N/A 0
P1.6/TA1/SDO/SCL/
6
A3+/TDI
SDO (SPI) / SCL (I2C) X X 1 0 N/A 0
A3+
(4)
X X X 1 3 0
TDI
(5)
X X X X X 1
P1.7
(3)
input/output 0/1 0 0 0 N/A 0
N/A 0 1 0 0 N/A 0
DVSS 1 1 0 0 N/A 0
P1.7/SDI/SDA/A3-/
7
TDO/TDI
SDI (SPI) / SDA (I2C) X X 1 0 N/A 0
A3-
(4)(6)
X X X 1 3 0
TDO/TDI
(7)(5)
X X X X X 1
(1) X = Don't care
(2) N/A = Not available or not applicable
(3) Default after reset (PUC/POR)
(4) Setting the SD16AE.x bit disables the output driver and the input Schmitt trigger to prevent parasitic cross currents when applying
analog signals.
(5) In JTAG mode, the internal pullup and pulldown resistors are disabled.
(6) With SD16AE.x = 0 the negative inputs are connected to VSS if the corresponding input is selected.
(7) Function controlled by JTAG
Copyright © 2005–2012, Texas Instruments Incorporated Submit Documentation Feedback 75