AM6421 datasheet(12/273 Pages) TI2

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5.2 Pin Attributes

The following list describes the contents of each column in Table 5-1, Pin Attributes (ALV, ANI Package):

1. BALL NUMBER: Ball numbers assigned to each terminal of the Ball Grid Array package.

2. BALL NAME: Ball name assigned to each terminal of the Ball Grid Array package (this name is typically

taken from the primary MUXMODE 0 signal function).

3. SIGNAL NAME: Signal name(s) of all dedicated and pin multiplexed signal functions associated with a ball.

Note

Many device pins support multiple signal functions. Some signal functions are selected via a single

layer of multiplexers associated with pins. Other signal functions are selected via two or more layers

of multiplexers, where one layer is associated with the pins and other layers are associated with

peripheral logic functions.

Table 5-1, Pin Attributes (ALV, ANI Package) only defines signal multiplexing at the pins. For more

information, related to signal multiplexing at the pins, see the Pad Configuration Registers section in

the Device Configuration chapter of the device TRM. For information associated with peripheral signal

multiplexing, see the respective peripheral chapter in the device TRM.

4. MUX MODE: The MUXMODE value associated with each pin multiplexed signal function:

a. MUXMODE 0 is the primary pin multiplexed signal function. However, the primary pin multiplexed signal

function is not necessarily the default pin multiplexed signal function.

Note

The value found in the MUX MODE AFTER RESET column defines the default pin multiplexed

signal function selected when MCU_PORz is deasserted.

b. MUXMODE values 1 through 15 are possible for pin multiplexed signal functions. However, not all

MUXMODE values have been implemented. The only valid MUXMODE values are those defined as pin

multiplexed signal functions within Table 5-1 Pin Attributes (ALV, ANI Package). Only valid values of

MUXMODE should be used.

c. Bootstrap defines SOC configuration pins, where the logic state applied to each pin is latched on the

rising edge of PORz_OUT. These input signal functions are fixed to their respective pins and are not

programmable via MUXMODE.

d. An empty box means Not Applicable.

Note

The following configurations of MUXMODE must be avoided for proper device operation.

• Configuring multiple pins operating as inputs to the same pin multiplexed signal function is not

supported as it can yield unexpected results.

• Configuring a pin to an undefined pin multiplexing mode will cause the pin behavior to be

undefined.

AM6442, AM6441, AM6422, AM6421, AM6412, AM6411

SPRSP56J – JANUARY 2021 – REVISED JUNE 2026

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AM6421 Datenblatt(PDF) 12 Page - Texas Instruments