CC3100_15 datasheet(22/44 Pages) TI

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CC3100 (master)

Serial flash

FLASH_SPI_CLK

FLASH_SPI_nCS

FLASH_SPI_MISO

FLASH_SPI_MOSI

SPI_CLK

SPI_CS

SPI_MISO

SPI_MOSI

SWAS031-026

CC3100

SWAS031D – JUNE 2013 – REVISED FEBRUARY 2015

www.ti.com

Table 4-11. Flash SPI Interface Timing Parameters

Parameter

Parameter Name

Min

Max

Unit

Number

Clock frequency

MHz

tclk

Clock period

tLP

Clock low period

tHT

Clock high period

Duty cycle

tIS

RX data setup time

tIH

RX data hold time

tOD

TX data output delay

8.5

tOH

TX data hold time

4.12 External Interfaces

4.12.1 SPI Flash Interface

The external serial flash stores the user profiles and firmware patch updates. The CC3100 device acts as

a master in this case; the SPI serial flash acts as the slave device. This interface can work up to a speed

of 20 MHz.

Figure 4-15 shows the SPI flash interface.

Figure 4-15. SPI Flash Interface

Table 4-12 lists the SPI flash interface pins.

Table 4-12. SPI Flash Interface

Pin Name

Description

FLASH_SPI_CLK

Clock (up to 20 MHz) CC3100 device to serial flash

FLASH_SPI_CS

CS (active low) signal from CC3100 device to serial flash

FLASH_SPI_MISO

Data from serial flash to CC3100 device

FLASH_SPI_MOSI

Data from CC3100 device to serial flash

4.12.2 SPI Host Interface

The device interfaces to an external host using the SPI interface. The CC3100 device can interrupt the

host using the HOST_INTR line to initiate the data transfer over the interface. The SPI host interface can

work up to a speed of 20 MHz.

Figure 4-16 shows the SPI host interface.

Specifications

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