CC3100_15 Datasheet, PDF (22/44 Pages) Texas Instruments – CC3100 SimpleLink Wi-Fi Network Processor, Internet-of-Things Solution for MCU Applications

CC3100
SWAS031D – JUNE 2013 – REVISED FEBRUARY 2015
www.ti.com
Table 4-11. Flash SPI Interface Timing Parameters
Parameter
Number
I1
I2
I3
I4
I5
I6
I7
I8
I9
Parameter
F
t_clk
t_LP
t_HT
D
t_IS
t_IH
t_OD
t_OH
Parameter Name
Clock frequency
Clock period
Clock low period
Clock high period
Duty cycle
RX data setup time
RX data hold time
TX data output delay
TX data hold time
Min
Max
Unit
20
MHz
50
ns
25
ns
25
ns
45
55
%
1
ns
2
ns
8.5
ns
8
ns
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.
CC3100 (master)
Serial flash
FLASH_SPI_CLK
FLASH_SPI_nCS
FLASH_SPI_MISO
FLASH_SPI_MOSI
SPI_CLK
SPI_CS
SPI_MISO
SPI_MOSI
Figure 4-15. SPI Flash Interface
SWAS031-026
Table 4-12 lists the SPI flash interface pins.
Pin Name
FLASH_SPI_CLK
FLASH_SPI_CS
FLASH_SPI_MISO
FLASH_SPI_MOSI
Table 4-12. SPI Flash Interface
Description
Clock (up to 20 MHz) CC3100 device to serial flash
CS (active low) signal from CC3100 device to serial flash
Data from serial flash to CC3100 device
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.
22
Specifications
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