MSP430X241X Datasheet, PDF (11/98 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x241x, MSP430x261x
MIXED SIGNAL MICROCONTROLLER
TERMINAL
NO.
NAME
64 80
PIN PIN
P8.4
66
P8.5
67
P8.6/XT2OUT
68
P8.7/XT2IN
69
XT2OUT
XT2IN
RST/NMI
TCK
TDI/TCLK
TDO/TDI
TMS
Ve_REF+/DAC0^†
V_REF+
52
53
58 74
57 73
55 71
54 70
56 72
10 10
7
7
V_REF--/Ve_REF--
11 11
XIN
8
8
XOUT
9
9
† _{MSP430F261x devices only}
SLAS541A -- JUNE 2007 -- REVISED OCTOBER 2007
Terminal Functions (Continued)
I/O
DESCRIPTION
I/O General-purpose digital I/O pin
I/O General-purpose digital I/O pin
O General-purpose digital I/O pin/Output terminal of crystal oscillator XT2
I
General-purpose digital I/O pin/Input port for crystal oscillator XT2. Only standard crystals can be
connected.
O Output terminal of crystal oscillator XT2
I Input port for crystal oscillator XT2
I Reset input, nonmaskable interrupt input port, or bootstrap loader start (in flash devices).
I Test clock (JTAG). TCK is the clock input port for device programming test and bootstrap loader start.
I Test data input or test clock input. The device protection fuse is connected to TDI/TCLK.
I/O Test data output port. TDO/TDI data output or programming data input terminal.
I Test mode select. TMS is used as an input port for device programming and test.
I Input for an external reference voltage/DAC12.0 output
O Output of positive terminal of the reference voltage in the ADC12
I
Negative terminal for the reference voltage for both sources, the internal reference voltage, or an
external applied reference voltage
I Input port for crystal oscillator XT1. Standard or watch crystals can be connected.
O Output port for crystal oscillator XT1. Standard or watch crystals can be connected.
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