AM1808_1004 Datasheet, PDF (20/264 Pages) Texas Instruments – AM1808 ARM Microprocessor

AM1808
SPRS653A – FEBRUARY 2010 – REVISED APRIL 2010
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3.7.2 High-Frequency Oscillator and PLL
Table 3-4. High-Frequency Oscillator and PLL Terminal Functions
SIGNAL
NAME
TYPE ⁽¹⁾
NO.
PULL ⁽²⁾
POWER
GROUP ⁽³⁾
DESCRIPTION
CLKOUT / UHPI_HDS2 /
PRU1_R30[13] / GP6[14]
T18
O
CP[22]
C
PLL Observation Clock
1.2-V OSCILLATOR
OSCIN
L19
I
—
—
Oscillator input
OSCOUT
K19
O
—
—
Oscillator output
OSCVSS
L18 GND
—
—
Oscillator ground (for filter only)
1.2-V PLL0
PLL0_VDDA
PLL0_VSSA
L15 PWR
M17 GND
—
—
—
—
1.2-V PLL1
PLL analog V_DD (1.2-V filtered supply)
PLL analog V_SS (for filter)
PLL1_VDDA
PLL1_VSSA
N15 PWR
—
M15 GND
—
—
PLL analog V_DD (1.2-V filtered supply)
—
PLL analog V_SS (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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