AM652X datasheet(283/299 Pages) TI1

283 / 299 page

MCU_OSPI[x]_CLK

OSPI/QSPI/SPI

device clock input

OSPI/QSPI/SPI

device IOy, CS#

MCU_OSPI[x]_D[y],

MCU_OSPI[x]_CSn[z]

OSPI_Board_02

MCU_OSPI[x]_LBCLKO

MCU_OSPI[x]_DQS

283

AM6548, AM6528, AM6546

AM6526, AM6527

www.ti.com

SPRSP08E – NOVEMBER 2017 – REVISED OCTOBER 2018

Submit Documentation Feedback

Product Folder Links: AM6548 AM6528 AM6546 AM6526 AM6527

Applications, Implementation, and Layout

Figure 7-2. OSPI Interface High Level Schematic

NOTE

*0 Ω resistor (R1), located as close as possible to the MCU_OSPI[x]_CLK and

MCU_OSPI[x]_LBCLKO pins, is placeholder for fine tuning, if needed

7.2.3

DQS (only available by Octal Flash devices)

•

The MCU_OSPI[x]_CLK output signal must be connected to the CLK pin of the flash device

•

The DQS pin of the flash devices must be connected to MCU_OSPI[x]_DQS signal

•

The signal propagation delay from the MCU_OSPI[x]_CLK pin to the flash device CLK input pin (A to

B) should be approximately equal to the signal propagation delay from the MCU_OSPI[x]_DQS pin to

the DQS output pin (C to D)

•

50 Ω PCB routing is recommended along with series terminations, as shown in Figure 7-3

•

Propagation delays and matching:

–

A to B = C to D

–

Matching skew: < 60pS

AM652X Arkusz danych(PDF) 283 Page - Texas Instruments