Datasheet
MSP430F42xA
MIXED SIGNAL MICROCONTROLLER
SLAS587 -- FEBRUARY 2008
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Terminal Functions
TERMINAL
I
/
O
D
E
S
C
R
I
P
T
I
O
N
NAME NO.
I
/
O DESCRIPTION
DV
CC
1 Digital supply voltage, positive terminal.
A0.0+ 2 I Internal connection to SD16 Channel 0, input 0 +. (see Note 1)
A0.0-- 3 I Internal connection to SD16 Channel 0, input 0 --. (see Note 1)
A1.0+ 4 I Internal connection to SD16 Channel 1, input 0 +. (see Note 1)
A1.0-- 5 I Internal connection to SD16 Channel 1, input 0 --. (see Note 1)
A2.0+ 6 I Internal connection to SD16 Channel 2, input 0 +. (see Note 1)
A2.0-- 7 I Internal connection to SD16 Channel 2, input 0 --. (see Note 1)
XIN 8 I Input port for crystal oscillator XT1. Standard or watch crystals can be connected.
XOUT 9 O Output terminal of crystal oscillator XT1
V
REF
10 I/O Input for an external reference voltage / internal reference voltage output (can be used as mid-voltage)
P2.2/STE0 11 I/O General-purpose digital I/O / slave transmit enable—USART0/SPI mode
S0 12 O LCD segment output 0
S1 13 O LCD segment output 1
S2 14 O LCD segment output 2
S3 15 O LCD segment output 3
S4 16 O LCD segment output 4
S5 17 O LCD segment output 5
S6 18 O LCD segment output 6
S7 19 O LCD segment output 7
S8 20 O LCD segment output 8
S9 21 O LCD segment output 9
S10 22 O LCD segment output 10
S11 23 O LCD segment output 11
S12 24 O LCD segment output 12
S13 25 O LCD segment output 13
S14 26 O LCD segment output 14
S15 27 O LCD segment output 15
S16 28 O LCD segment output 16
S17 29 O LCD segment output 17
S18 30 O LCD segment output 18
S19 31 O LCD segment output 19
S20 32 O LCD segment output 20
S21 33 O LCD segment output 21
S22 34 O LCD segment output 22
S23 35 O LCD segment output 23
COM0 36 O Common output, COM0--3 are used for LCD backplanes.
COM1 37 O Common output, COM0--3 are used for LCD backplanes.
COM2 38 O Common output, COM0--3 are used for LCD backplanes.
COM3 39 O Common output, COM0--3 are used for LCD backplanes.
R03 40 I Input port of fourth positive (lowest) analog LCD level (V5)
NOTE 1: It is recommended to short unused analog input pairs and connect them to analog ground.