Datasheet

AM1808

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SPRS653E –FEBRUARY 2010–REVISED MARCH 2014

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 O CP[22] C PLL Observation Clock

PRU1_R30[13] / GP6[14]

1.2-V OSCILLATOR

OSCIN L19 I — — Oscillator input

OSCOUT K19 O — — Oscillator output

OSCVSS L18 GND — — Oscillator ground

1.2-V PLL0

PLL0_VDDA L15 PWR — — PLL analog V

(1.2-V filtered supply)

PLL0_VSSA M17 GND — — PLL analog V

(for filter)

1.2-V PLL1

PLL1_VDDA N15 PWR — — PLL analog V

(1.2-V filtered supply)

PLL1_VSSA M15 GND — — PLL analog V

(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. For more detailed information on pullup/pulldown resistors and situations

where external pullup/pulldown resistors are required, see the Device Configuration section. For electrical specifications on pullup and

internal pulldown circuits, see the Device Operating Conditions section.

(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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