Datasheet

MSP430x12x
MIXED SIGNAL MICROCONTROLLER
SLAS312C − JULY 2001 − REVISED SEPTEMBER 2004
30
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
input/output schematic (continued)
port P3, P3.0 and P3.4 to P3.7, input/output with Schmitt-trigger
P3.0/STE0
P3IN.x
Module X IN
Pad Logic
EN
D
P3OUT.x
P3DIR.x
P3SEL.x
Module X OUT
Direction Control
From Module
0
1
0
1
P3.4/UTXD0
P3.5/URXD0
0: Input
1: Output
x: Bit Identifier, 0 and 4 to 7 for Port P3
P3.6
P3.7
PnSel.x PnDIR.x
DIRECTION
CONTROL
FROM MODULE
PnOUT.x MODULE X OUT PnIN.x MODULE X IN
P3Sel.0 P3DIR.0 V
SS
P3OUT.0 V
SS
P3IN.0 STE0
P3Sel.4 P3DIR.4 V
CC
P3OUT.4 UTXD0
†
P3IN.4 Unused
P3Sel.5 P3DIR.5 V
SS
P3OUT.5 V
SS
P3IN.5 URXD0
‡
P3Sel.6 P3DIR.6 V
SS
P3OUT.6 V
SS
P3IN.6 Unused
P3Sel.7 P3DIR.7 V
SS
P3OUT.7 V
SS
P3IN.7 Unused
†
Output from USART0 module
‡
Input to USART0 module
port P3, P3.1, input/output with Schmitt-trigger
P3.1/SIMO0
P3IN.1
Pad Logic
EN
D
P3OUT1
P3DIR.1
P3SEL.1
(SI)MO0
0
1
0
1
DCM_SIMO
SYNC
MM
STE
STC
From USART0
SI(MO)0
To USART0
0: Input
1: Output