OMAP3530ECUS datasheet(133/264 Pages) TI1

133 / 264 page

CLOCK SPECIFICATIONS

OMAP

PowerIC

sys_32k

sys_altclk

sys_clkout1

AlternateClockSourceSelectable(54,48MHzorother[up

to59MHz])

ToQuartz (Oscillatoroutput)orUnconnected

ToQuartz (Oscillatorinput)orSquareClock

ClockRequest.ToSquareClockSourceorfromPeripherals

Oscillator

isUsed

Oscillator

isBypassed

Unconnected

Square

Clock

Source

ToPeripherals (FromOSC_CLK:12,13,16.8,19.2,26,or

38.4MHz,core_clk[DPLL,upto332MHz],DPLL-96MHz

orDPLL-54MHzoutputswithadividerof1,2,4,8,or16)

GPin

ToPeripherals (FromOSC_CLK:12,13,16.8,19.2,26,or

38.4MHz)

sys_clkout2

sys_xtalout

sys_xtalin

sys_clkreq

sys_xtalout

sys_xtalin

sys_clkreq

sys_xtalout

sys_xtalin

sys_clkreq

030-007

OMAP3530/25 Applications Processor

www.ti.com

SPRS507F – FEBRUARY 2008 – REVISED OCTOBER 2009

The OMAP3530/25 device has three external input clocks, a low frequency (sys_32k), a high frequency

(sys_xtalin), and an optional (sys_altclk). The OMAP3530/25 device has two configurable output clocks,

sys_clkout1 and sys_clkout2.

Figure 4-1 shows the interface to the external clock sources and clock outputs.

Figure 4-1. Clock Interface

The OMAP3530/25 device operation requires the following three input clocks:

• The 32-kHz frequency is used for low frequency operation. It supplies the wake-up domain for

operation in lowest power mode (off mode). This clock is provided through the sys_32k pin.

• The system alternative clock can be used (through the sys_altclk pin) to provide alternative 48 or 54

MHz or other clock source (up to 59 MHz).

• The system clock input (12, 13, 16.8, 19.2, 26, or 38.4 MHz) is used to generate the main source clock

of the OMAP3530/25 device. It supplies the DPLLs as well as several OMAP modules. The system

clock input can be connected to either:

–

A crystal oscillator clock managed by sys_xtalin and sys_xtalout. In this case, the sys_clkreq is

used as an input (GPIN).

–

A CMOS digital clock through the sys_xtalin pin. In this case, the sys_clkreq is used as an output to

request the external system clock.

The OMAP3530/25 outputs externally two clocks:

• sys_clkout1 can output the oscillator clock (12, 13, 16.8, 19.2, 26, or 38.4 MHz) at any time. It can be

controlled by software or externally using sys_clkreq control. When the device is in the off state, the

sys_clkreq can be asserted to enable the oscillator and activate the sys_clkout1 without waking up the

device. The off state polarity of sys_clkout1 is programmable.

Submit Documentation Feedback

CLOCK SPECIFICATIONS

133

OMAP3530ECUS 数据表(PDF) 133 Page - Texas Instruments

OMAP3530ECUS 数据表(HTML) 133 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

数据表下载

链接网址

OMAP3530ECUS 数据表(PDF) 133 Page - Texas Instruments

OMAP3530ECUS 数据表(HTML) 133 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

数据表 下载

链接网址

数据表下载