AM1808AZCE3 datasheet(20/264 Pages) TI

20 / 264 page

AM1808

SPRS653 – FEBRUARY 2010

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3.7.2

High-Frequency Oscillator and PLL

Table 3-4. High-Frequency Oscillator and PLL Terminal Functions

SIGNAL

POWER

TYPE(1)

PULL(2)

DESCRIPTION

GROUP(3)

NAME

NO.

CLKOUT / UHPI_HDS2 /

T18

CP[22]

PLL Observation Clock

PRU1_R30[13] / GP6[14]

1.2-V OSCILLATOR

OSCIN

L19

—

Oscillator input

OSCOUT

K19

—

Oscillator output

OSCVSS

L18

GND

—

Oscillator ground (for filter only)

1.2-V PLL0

PLL0_VDDA

L15

PWR

—

PLL analog VDD (1.2-V filtered supply)

PLL0_VSSA

M17

GND

—

PLL analog VSS (for filter)

1.2-V PLL1

PLL1_VDDA

N15

PWR

—

PLL analog VDD (1.2-V filtered supply)

PLL1_VSSA

M15

GND

—

PLL analog VSS (for filter)

(1)

I = Input, O = Output, I/O = Bidirectional, Z = High impedance, PWR = Supply voltage, GND = Ground, A = Analog signal.

Note: For multiplexed pins where functions have different types (ie., input versus output), the table reflects the pin function direction for

that particular peripheral.

(2)

IPD = Internal Pulldown resistor; IPU = Internal Pullup resistor; CP[n] = configurable pull-up/pull-down (where n is the pin group) using

the PUPDENA and PUPDSEL registers in the System Module.

(3)

This signal is part of a dual-voltage IO group (A, B or C). These groups can be operated at 3.3V or 1.8V nominal. The three groups can

be operated at independent voltages but all pins withina group will operate at the same voltage. Group A operates at the voltage of

power supply DVDD3318_A. Group B operates at the voltage of power supply DVDD3318_B. Group C operates at the voltage of power

supply DVDD3318_C.

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