AM5728 datasheet(151/415 Pages) TI1

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AM5729, AM5728, AM5726

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SPRS953F – DECEMBER 2015 – REVISED MAY 2019

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Terminal Configuration and Functions

Table 4-29. PRCM Signal Descriptions (continued)

SIGNAL NAME

DESCRIPTION

TYPE

BALL

clkout2

Device Clock output 2. Can be used externally for devices with noncritical

timing requirements, or for debug.

D18/ N1

clkout3

Device Clock output 3. Can be used externally for devices with noncritical

timing requirements, or for debug.

C23

rstoutn

Reset out (Active low). This pin asserts low in response to any global reset

condition on the device. (2)

F23

resetn

Device Reset Input

E23

porz

Power on Reset (active low). This pin must be asserted low until all device

supplies are valid (see reset sequence/requirements)

F22

xref_clk0

External Reference Clock 0. For Audio and other Peripherals.

D18

xref_clk1

External Reference Clock 1. For Audio and other Peripherals.

E17

xref_clk2

External Reference Clock 2. For Audio and other Peripherals.

B26

xref_clk3

External Reference Clock 3. For Audio and other Peripherals.

C23

xi_osc0

System Oscillator OSC0 Crystal input / LVCMOS clock input. Functions as the

input connection to a crystal when the internal oscillator OSC0 is used.

Functions as an LVCMOS-compatible input clock when an external oscillator is

used.

AE15

xo_osc0

System Oscillator OSC0 Crystal output

AD15

xi_osc1

Auxiliary Oscillator OSC1 Crystal input / LVCMOS clock input.Functions as the

input connection to a crystal when the internal oscillator OSC1 is used.

Functions as an LVCMOS-compatible input clock when an external oscillator is

used

AC15

xo_osc1

Auxiliary Oscillator OSC1 Crystal output

AC13

RMII_MHZ_50_CLK(1)

RMII Reference Clock (50MHz). This pin is an input when external reference is

used or output when internal reference is used.

(1) This clock signal is implemented as 'pad loopback' inside the device - the output signal is looped back through the input buffer to serve

as the internal reference signal. Series termination is recommended (as close to device pin as possible) to improve signal integrity of the

clock input. Any nonmonotonicity in voltage that occurs at the pad loopback clock pin between VIH and VIL must be less than VHYS.

(2) Note that rstoutn is only valid after vddshv3 is valid. If the rstoutn signal will be used as a reset into other devices attached to the SOC, it

must be AND'ed with porz. This will prevent glitches occurring during supply ramping being propagated.

4.4.25.3 Real-Time Clock (RTC) Interface

NOTE

For more information, see the Real-Time Clock (RTC) chapter of the device TRM.

NOTE

RTC only mode is not supported feature.

Table 4-30. RTC Signal Descriptions

SIGNAL NAME

DESCRIPTION

TYPE

BALL

Wakeup0

RTC External Wakeup Input 0

AD17

Wakeup1

RTC External Wakeup Input 1

AC17

Wakeup2

RTC External Wakeup Input 2

AB16

Wakeup3

RTC External Wakeup Input 3

AC16

rtc_porz

RTC Power Domain Power-On Reset Input

AB17

rtc_osc_xi_clkin32

RTC Oscillator Input. Crystal connection to internal RTC oscillator. Functions as

an RTC clock input when an external oscillator is used.

AE14

rtc_osc_xo

RTC Oscillator Output

AD14

rtc_iso(1)

RTC Domain Isolation Signal

AF14

on_off

RTC Power Enable output pin

Y11

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