MSP430X11X1 Datasheet, PDF (42/45 Pages) Texas Instruments – MIXED SIGNAL MICROCONTROLLER

MSP430x11x1
MIXED SIGNAL MICROCONTROLLER
SLAS241C – SEPTEMBER 1999 – REVISED JUNE 2000
APPLICATION INFORMATION
Port P2, unbonded bits P2.6 and P2.7
P2SEL.x
0
P2DIR.x
Direction Control
1
From Module
0
P2OUT.x
1
Module X OUT
0: Input
1: Output
P2IN.x
EN
Module X IN
D
Node Is Reset With PUC
Bus Keeper
P2IRQ.x
P2IE.x
EN
Q
P2IFG.x
Set
Interrupt
Edge
Select
PUC
Interrupt
Flag
NOTE: x = Bit/identifier, 6 to 7 for port P2 without external pins
P2IES.x
P2SEL.x
P2Sel.x P2DIR.x
Direction
control from
module
P2OUT.x Module X OUT P2IN.x
Module X IN
P2IE.x
P2IFG.x P2IES.x
P2Sel.6 P2DIR.6
P2DIR.6
P2OUT.6
VSS
P2IN.6
unused
P2IE.6
P2IFG.6 P2IES.6
P2Sel.7 P2DIR.7
P2DIR.7
P2OUT.7
VSS
P2IN.7
unused
P2IE.7
P2IFG.7 P2IES.7
NOTE: A good use of the unbonded bits 6 and 7 of port P2 is to use the interrupt flags. The interrupt flags can not be influenced from any signal
other than from software. They work then as a soft interrupt.
JTAG fuse check mode
MSP430 devices that have the fuse on the TEST terminal have a fuse check mode that tests the continuity of
the fuse the first time the JTAG port is accessed after a power-on reset (POR). When activated, a fuse check
current can flow from the TEST pin to ground if the fuse is not burned. Care must be taken to avoid accidentally
activating the fuse check mode and increasing overall system power consumption.
When the TEST pin is taken back low after a test or programming session, the fuse check mode and sense
currents are terminated.
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