Datasheet

MSP430FR4133, MSP430FR4132, MSP430FR4131
www.ti.com SLAS865B –OCTOBER 2014–REVISED AUGUST 2015
4.3 Pin Multiplexing
Pin multiplexing for these devices is controlled by both register settings and operating modes (for
example, if the device is in test mode). For details of the settings for each pin and schematics of the
multiplexed ports, see Section 6.9.13.
4.4 Connection of Unused Pins
Table 4-2 shows the correct termination of unused pins.
Table 4-2. Connection of Unused Pins
(1)
PIN POTENTIAL COMMENT
Px.0 to Px.7 Open Switched to port function, output direction (PxDIR.n = 1)
RST/NMI DVCC 47-kΩ pullup or internal pullup selected with 10-nF (1.1-nF) pulldown
(2)
TEST Open This pin always has an internal pulldown enabled.
(1) Any unused pin with a secondary function that is shared with general-purpose I/O should follow the Px.0 to Px.7 unused pin connection
guidelines.
(2) The pulldown capacitor should not exceed 1.1 nF when using devices with Spy-Bi-Wire interface in Spy-Bi-Wire mode with TI tools like
FET interfaces or GANG programmers.
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