AM652X datasheet(147/299 Pages) TI1

147 / 299 page

Device

WKUP_LFOSC0_XO

WKUP_LFOSC0_XI

Crystal

(Optional)

SPRSP08_PCB_CLK_OSC_3

Rbias

(Optional)

PCB Ground

Device

OSC1_XO

OSC1_XI

SPRSP08_PCB_CLK_OSC_NU1

Rpd

PCB Ground

147

AM6548, AM6528, AM6546

AM6526, AM6527

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SPRSP08E – NOVEMBER 2017 – REVISED OCTOBER 2018

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Product Folder Links: AM6548 AM6528 AM6546 AM6526 AM6527

Specifications

5.11.4.1.5 Auxiliary OSC1 Not Used

Figure 5-20 shows the recommended oscillator connections when OSC1 is not used. OSC1_XI must be

connected to VSS through an external pull resistor (Rpd) to ensure this input is held to a valid low level

when unused since the internal pull-down resistor is disabled by default.

Figure 5-20. OSC1 Not Used

5.11.4.1.6 WKUP_LFOSC0 Internal Oscillator Clock Source

Figure 5-21 shows the recommended crystal circuit. It is recommended that preproduction printed-circuit

board (PCB) designs include the two optional resistors Rbias and Rd in case they are required for proper

oscillator operation when combined with production crystal circuit components. In most cases, Rbias is not

required and Rd is a 0 ohm resistor. These resistors may be removed from production PCB designs after

evaluating oscillator performance with production crystal circuit components installed on preproduction

PCBs.

Figure 5-21. WKUP_LFOSC0 Crystal Implementation

AM652X Scheda tecnica(PDF) 147 Page - Texas Instruments