AM3874 datasheet(111/361 Pages) TI

111 / 361 page

AM3874, AM3871

www.ti.com

SPRS695C – SEPTEMBER 2011 – REVISED DECEMBER 2013

3.2.18 Oscillator/PLL, Audio Reference Clocks, and Clock Generator

Table 3-34. Oscillator/PLL, Audio Reference Clocks, and Clock Generator Terminal Functions

SIGNAL

TYPE(1)

OTHER(2) (3)

MUXED

DESCRIPTION

NAME

NO.

CLOCK GENERATOR

VIN[0]A_D[12]_BD[4]/

VIN[0]A, GP2

IPD

CLKOUT1/

AG17

I/O

PINCNTL152

DVDD

GP2[17]

DSIS: PIN

GPMC_CLK/

Device Clock output 1. Can be used as a system clock

GPMC_CS[5]/

GPMC, EDMA,

for other devices.

GPMC_WAIT[1]/

IPU

TIM4, GP1

CLKOUT1/

R26

DVDD_GPMC

PINCNTL127

EDMA_EVT3/

DSIS: N/A

TIM4_IO/

GP1[27]

VIN[0]B_CLK/

VIN[0]B, GP1

IPD

CLKOUT0/

AE17

I/O

PINCNTL134

DVDD

GP1[9]

DSIS: PIN

Device Clock output 0. Can be used as a system clock

CLKIN32/

CLKIN32, TIM3,

for other devices.

CLKOUT0/

IPD

GP3

TIM3_IO/

DVDD

PINCNTL259

GP3[31]

DSIS: N/A

OSCILLATOR/PLL

Device Crystal input. Crystal connection to internal

DEVOSC_MXI/

–

AH2

A I

–

oscillator for system clock. Functions as DEV_CLKIN

DEV_CLKIN

VDDA_1P8

clock input when an external oscillator is used.

Device Crystal output. Crystal connection to internal

–

DEVOSC_MXO

AH3

A O

–

oscillator for system clock. When device oscillator is

VDDA_1P8

BYPASSED, leave this pin unconnected.

Supply Ground for DEV Oscillator. If the internal

VSSA_DEVOSC

AG3

GND

oscillator is bypassed, DEVOSC_VSS should be

connected to ground (VSS).

Auxiliary Crystal input [Optional Audio/Video Reference

AUXOSC_MXI/

–

Crystal Input]. Crystal connection to internal oscillator

A I

–

AUX_CLKIN

VDDA_1P8

for auxiliary clock. Functions as AUX_CLKIN clock input

when an external oscillator is used.

Auxiliary Crystal output [Optional Audio/Video

–

AUXOSC_MXO

A O

–

Reference Crystal Output]. When auxiliary oscillator is

VDDA_1P8

BYPASSED, leave this pin unconnected.

Supply Ground for AUX Oscillator. If the internal

VSSA_AUXOSC

GND

oscillator is bypassed, AUXOSC_VSS should be

connected to ground (VSS).

CLKIN32/

CLKOUT0,

CLKOUT0/

IPD

TIMER 3, GP3

RTC Clock input. Optional 32.768 KHz clock for RTC

TIM3_IO/

DVDD

PINCNTL259

reference.

GP3[31]

DSIS: PIN

DEVOSC_WAKE/

SPI[1], TIMER 5,

SPI[1]_SCS[1]/

IPU

GP1

Oscillator Wake-up input.

TIM5_IO/

DVDD_SD

PINCNTL7

GP1[7]

DSIS: 1

(1)

I = Input, O = Output, Z = High impedance, S = Supply voltage, GND = Ground, A = Analog signal, MM = Multi Muxed, DSIS = De-

selected Input State

(2)

IPD = Internal Pulldown Active, IPU = Internal Pullup Active, DIS = Internal Pull Disabled. This represents the default state of the

Internal Pull during and after Reset. For more detailed information on pullup/pulldown resistors and situations where external

pullup/pulldown resistors are required, see Section 4.5.1, Pullup/Pulldown Resistors and Section 7.3.17, Pin Behaviors at Reset.

(3)

Specifies the operating I/O supply voltage for each signal

Device Pins

111

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