MSP430X15X Datasheet, PDF (55/73 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x15x, MSP430x16x, MSP430x161x
MIXED SIGNAL MICROCONTROLLER
SLAS368E − OCTOBER 2002 − REVISED AUGUST 2006
APPLICATION INFORMATION
input/output schematic (continued)
port P3, P3.2, input/output with Schmitt-trigger
SYNC
MM
STC
STE
P3SEL.2
P3DIR.2
DCM_SOMI
P3OUT.2
SO(MI)0
From USART0
0: Input
0
1: Output
1
Pad Logic
0
1
P3.2/SOMI0
P3IN.2
EN
(SO)MI0
D
To USART0
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/SCL
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).
I²C, slave mode: The clock applied to SCL is used to shift data in and out. The frequency of the clock source of the module must be
w 10 times the frequency of the SCL clock.
I²C, master mode: To shift data in and out, the clock is supplied via the SCL terminal to all I²C slaves. The frequency of the clock source
of the module must be w 10 times the frequency of the SCL clock.
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