MSP430F1122 Datasheet, PDF (38/48 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x11x2, MSP430x12x2
MIXED SIGNAL MICROCONTROLLER
SLAS361C − JANUARY 2002 − REVISED DECEMBER 2003
APPLICATION INFORMATION
input/output schematic (continued)
port P3, P3.3, input/output with Schmitt-trigger
SYNC
MM
STC
STE
P3SEL.3
P3DIR.3
DCM_UCLK
P3OUT.3
UCLK.0
From USART0
0: Input
0
1: Output
1
Pad Logic
0
1
P3.3/UCLK0
P3IN.3
EN
UCLK0
D
To USART0
NOTE: UART mode:
The UART clock can only be an input. If UART mode and UART function are selected, the P3.3/UCLK0 is always
an input.
SPI, slave mode: The clock applied to UCLK0 is used to shift data in and out.
SPI, master mode: The clock to shift data in and out is supplied to connected devices on pin P3.3/UCLK0 (in slave mode).
port P3, P3.4, and P3.5 input/output with Schmitt-trigger
P3SEL.x
P3DIR.x
Direction Control
From Module
P3OUT.x
Module X OUT
0: Input
0
1: Output
1
Pad Logic
0
1
P3.4/UTXD0
P3.5/URXD0
P3IN.x
EN
Module X IN
D
x {4,5}
PnSel.x
PnDIR.x
P3Sel.4
P3DIR.4
P3Sel.5
P3DIR.5
† _{Output from USART0 module}
‡ _{Input to USART0 module}
DIRECTION
CONTROL
FROM MODULE
VCC
VSS
PnOUT.x
P3OUT.4
P3OUT.5
MODULE X OUT
UTXD0†
VSS
PnIN.x
P3IN.4
P3IN.5
MODULE X IN
Unused
URXD0‡
38
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