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SLAS826F – MARCH 2015 – REVISED MARCH 2017
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Terminal Configuration and Functions
Copyright © 2015–2017, Texas Instruments Incorporated
(1)
This is a switch, not a buffer.
(2)
Only for input pins
(3)
This is supply input, not a buffer.
4.4
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 diagrams of the
multiplexed ports, see
4.5
Buffer Types
describes the buffer types that are referenced in
.
Table 4-3. Buffer Type
BUFFER TYPE
(STANDARD)
NOMINAL
VOLTAGE
HYSTERESIS
PU OR PD
NOMINAL
PU OR PD
STRENGTH
(µA)
OUTPUT
DRIVE
STRENGTH
(mA)
OTHER
CHARACTERISTICS
Analog
(1)
3.0 V
N
N/A
N/A
N/A
See analog modules in
Specifications
for details
HVCMOS
13.0 V
Y
N/A
N/A
See
Typical
Characteristics
LVCMOS
3.0 V
Y
(2)
Programmable
See
General-
Purpose I/Os
See
Typical
Characteristics
Power (DVCC)
(3)
3.0 V
N
N/A
N/A
N/A
SVSMH enables hysteresis
on DVCC
Power (AVCC)
(3)
3.0 V
N
N/A
N/A
N/A
Power (DVSS and
AVSS)
(3)
0 V
N
N/A
N/A
N/A
(1)
For any unused pin with a secondary function that is shared with general-purpose I/O, follow the guidelines for the Px.0 to Px.7 pins.
4.6
Connection for Unused Pins
lists the correct termination of all unused pins.
Table 4-4. Connection for Unused Pins
(1)
PIN
POTENTIAL
COMMENT
AVCC
DV
CC
AVSS
DV
SS
Px.0 to Px.7
Open
Set to port function, output direction, and leave unconnected on the PC board
RSTn/NMI
DV
CC
or V
CC
47-k
Ω
pullup with 1.1-nF pulldown.
PJ.4/TDI
Open
The JTAG TDI pin is shared with general-purpose I/O function (PJ.4). If not being used, this pin
should be set to port function, output direction. When used as JTAG TDI pin, it should remain open.
PJ.5/TDO/SWO
DV
CC
or V
CC
The JTAG TDO/SWO pin is shared with general-purpose I/O function (PJ.5). If not being used, this
pin should be set to port function, output direction. When used as JTAG TDO/SWO pin, it should be
pulled down externally.
SWDIOTMS
DV
CC
or V
CC
This pin should be pulled up externally.
SWCLKTCK
DV
SS
or V
SS
This pin should be pulled down externally.