MSP430FR6889 Datasheet, PDF (114/176 Pages) Texas Instruments – Mixed-Signal Microcontrollers

MSP430FR6889, MSP430FR68891, MSP430FR6888, MSP430FR6887
MSP430FR5889, MSP430FR58891, MSP430FR5888, MSP430FR5887
SLASE32A – AUGUST 2014 – REVISED MARCH 2015
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Table 6-34. Port P9 (P9.0 to P9.3) Pin Functions
PIN NAME (P9.x)
P9.0/ESICH0/ESITEST0/A8/C8
x
FUNCTION
0 P9.0 (I/O)
N/A
Internally tied to DVSS
ESITEST0 ⁽²⁾
ESICH0/A8/C8 ^(2)(3)(4)
CONTROL BITS AND SIGNALS ⁽¹⁾
P9DIR.x
P9SEL1.x P9SEL0.x
I: 0; O: 1
0
0
0
0
1
1
X
1
0
X
1
1
P9.1/ESICH1/ESITEST1/A9/C9
1 P9.1 (I/O)
N/A
Internally tied to DVSS
ESITEST1 ⁽²⁾
ESICH1/A9/C9 ^(2)(3)(4)
I: 0; O: 1
0
0
0
0
1
1
X
1
0
X
1
1
P9.2/ESICH2/ESITEST2/A10/C10
2 P9.2 (I/O)
N/A
Internally tied to DVSS
ESITEST2 ⁽²⁾
ESICH2/A10/C10 ^(2)(3)(4)
I: 0; O: 1
0
0
0
0
1
1
X
1
0
X
1
1
P9.3/ESICH3/ESITEST3/A11/C11
3 P9.3 (I/O)
I: 0; O: 1
0
0
N/A
Internally tied to DVSS
ESITEST3 ⁽²⁾
ESICH3/A11/C11 ^{(2) (3)(4)}
0
0
1
1
X
1
0
X
1
1
(1) X = Don't care
(2) Setting P9SEL1.x disables the output driver and the input Schmitt trigger to prevent parasitic cross currents when applying analog
signals.
(3) Setting the CEPD.x bit of the comparator disables the output driver and the input Schmitt trigger to prevent parasitic cross currents when
applying analog signals. Selecting the Cx input pin to the comparator multiplexer with the input select bits in the comparator module
automatically disables output driver and input buffer for that pin, regardless of the state of the associated CEPD.x bit.
(4) Depending on the configuration of the ESI module other ESICHx pins are stimulated as well and thus should have the input Schmitt
triggers disabled (with P9SEL1.x = 1) and cannot be used as digital I/O, ADC or comparator inputs.
114 Detailed Description
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