Bus
Keeper
EN
Direction
0: Input
1: Output
P1SEL.x
1
0
P1DIR.x
P1IN.x
P1IRQ.x
D
EN
Module X IN
1
0
Module X OUT
P1OUT.x
Interrupt
Edge
Select
Q
EN
Set
P1SEL.x
P1IES.x
P1IFG.x
P1IE.x
P1.4/SMCLK/TCK
P1.5/TA0/TMS
P1.6/TA1/TDI
1
0
DVSS
DVCC
P1REN.x
To JTAG
From JTAG
1
Pad Logic
MSP430G2744, MSP430G2544, MSP430G2444
www.ti.com
SLAS892C – MARCH 2013 – REVISED SEPTEMBER 2014
6.19.2 Port P1 Pin Schematic: P1.4 to P1.6, Input/Output With Schmitt Trigger and In-
System Access Features
Table 6-16. Port P1 (P1.4 to P1.6) Pin Functions
CONTROL BITS OR SIGNALS
(1)
PIN NAME (P1.x)
x
FUNCTION
P1DIR.x
P1SEL.x
4-Wire JTAG
P1.4
(2)
(I/O)
I: 0; O: 1
0
0
P1.4/SMCLK/TCK
4
SMCLK
1
1
0
TCK
X
X
1
P1.5
(2)
(I/O)
I: 0; O: 1
0
0
P1.5/TA0/TMS
5
Timer_A3.TA0
1
1
0
TMS
X
X
1
P1.6
(2)
(I/O)
I: 0; O: 1
0
0
P1.6/TA1/TDI/TCLK
6
Timer_A3.TA1
1
1
0
TDI/TCLK
(3)
X
X
1
(1)
X = Don't care
(2)
Default after reset (PUC, POR)
(3)
Function controlled by JTAG
Copyright © 2013–2014, Texas Instruments Incorporated
Detailed Description
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