AM5728 datasheet(206/415 Pages) TI1

206 / 415 page

rtc_osc_xi_clkin32

CK0

CK1

Device

rtc_osc_xo

rtc_osc_xi_clkin32

SPRS85v_CLK_11

206

AM5729, AM5728, AM5726

SPRS953F – DECEMBER 2015 – REVISED MAY 2019

www.ti.com

Submit Documentation Feedback

Product Folder Links: AM5729 AM5728 AM5726

Clock Specifications

6.1.4.2

RTC Oscillator Input Clock

A 1.8-V LVCMOS-Compatible Clock Input can be used instead of the internal oscillator to provide the

FUNC_32K_CLK clock input to the system. The external connections to support this are shown in

Figure 6-12. The rtc_osc_xi_clkin32 pin is connected to the 1.8-V LVCMOS-Compatible clock sources.

The rtc_osc_xo pin is left unconnected.

Figure 6-12. LVCMOS-Compatible Clock Input

Table 6-11 summarizes the RTC Oscillator input clock electrical characteristics.

Table 6-11. RTC Oscillator Input Clock Electrical Characteristics—Bypass Mode

NAME

DESCRIPTION

MIN

TYP

MAX

UNIT

CK0

1/tc(rtc_osc_xi_clkin32) Frequency, rtc_osc_xi_clkin32

32.768

kHz

CK1

tw(rtc_osc_xi_clkin32)

Pulse duration, rtc_osc_xi_clkin32 low or

high

0.45 *

tc(rtc_osc_xi_clkin32)

0.55 *

tc(rtc_osc_xi_clkin32)

CIN

Input capacitance

2.178

2.378

2.578

IIN

Input current (3.3V mode)

µA

tsX

Start-up time

See (1)

(1) Before the processor boots up and the oscillator is set to bypass mode, there is a waiting time when the internal oscillator is

inapplication mode and receives a wave. The switching time in this case is about 100 μs.

Figure 6-13. rtc_osc_xi_clkin32 Input Clock

6.2

RC On-die Oscillator Clock

NOTE

The OSC_32K_CLK clock, provided by the On-die 32K RC oscillator, inside of the SoC, is

not accurate 32kHz clock.

The frequency may significantly vary with temperature and silicon characteristics.

For more information about OSC_32K_CLK see the Device TRM, Chapter: Power, Reset, and Clock

Management.

6.3

DPLLs, DLLs Specifications

AM5728 Datasheet(PDF) 206 Page - Texas Instruments

AM5728 Datasheet(HTML) 206 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL