Datasheet

To Module
From Module
PxOUT.y
DV
SS
DV
CC
1
1
0
PxIN.y
PxSEL.y
PxREN.y
1
0
PxIRQ.y
PxIE.y
EN
Set
Q
Interrupt
Edge
Select
PxSEL.y
PxIES.y
PxIFG.y
Direction
0: Input
1: Output
PxDIR.y
PxSEL.y
0
1
From JTAG
To JTAG
P1.4/SMCLK/TCK
MSP430G2x31
MSP430G2x21
www.ti.com SLAS694J –FEBRUARY 2010–REVISED FEBRUARY 2013
Port P1 Pin Schematic: P1.4, Input/Output With Schmitt Trigger – MSP430G2x21
Table 14. Port P1 (P1.4) Pin Functions – MSP430G2x21
CONTROL BITS / SIGNALS
(1)
PIN NAME (P1.x) x FUNCTION
P1DIR.x P1SEL.x JTAG Mode
P1.4/ P1.x (I/O) I: 0; O: 1 0 0
SMCLK/ 4 SMCLK 1 1 0
TCK TCK X X 1
(1) X = don't care
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