CC3100MOD_15 Datasheet, PDF (20/41 Pages) Texas Instruments – CC3100MOD SimpleLink™ Certified Wi-Fi® Network Processor Internet-of-Things Module Solution for MCU Applications

CC3100MOD
SWRS161 – DECEMBER 2014
www.ti.com
Pin Name
HOST_SPI_CLK
HOST_SPI_nCS
HOST_SPI_MOSI
HOST_INTR
HOST_SPI_MISO
nHIB
Table 4-4. SPI Host Interface
Description
Clock (up to 20 MHz) from MCU host to CC3100 device
CS (active low) signal from MCU host to CC3100 device
Data from MCU host to CC3100 device
Interrupt from CC3100 device to MCU host
Data from CC3100 device to MCU host
Active-low signal that commands the CC3100 device to enter hibernate mode (lowest power
state)
4.11.4.3 Host UART
The SimpleLink device requires the UART configuration described in Table 4-5.
Table 4-5. SimpleLink UART Configuration
Property
Supported CC3100 Configuration
Baud rate
115200 bps, no auto-baud rate detection, can be changed by the host up to 3 Mbps using a special command
Data bits
8 bits
Flow control
CTS/RTS
Parity
None
Stop bits
1
Bit order
LSBit first
Host interrupt polarity
Active high
Host interrupt mode
Endianness
Rising edge or level 1
Little-endian only⁽¹⁾
(1) The SimpleLink device does not support automatic detection of the host length while using the UART interface.
4.11.4.3.1 5-Wire UART Topology
Figure 4-11 shows the typical 5-wire UART topology comprised of 4 standard UART lines plus one IRQ
line from the device to the host controller to allow efficient low power mode.
RTS
RTS
HOST MCU
UART
CTS
TX
RX
CTS
TX
RX
CC3100 SL
UART
HOST_INTR(IRQ)
HOST_INTR(IRQ)
SWAS031-088
Figure 4-11. Typical 5-Wire UART Topology
This is the typical and recommended UART topology because it offers the maximum communication
reliability and flexibility between the host and the SimpleLink device.
4.11.4.3.2 4-Wire UART Topology
The 4-wire UART topology eliminates the host IRQ line (see Figure 4-12). Using this topology requires
one of the following conditions to be met:
• Host is always awake or active.
• Host goes to sleep but the UART module has receiver start-edge detection for auto wakeup and does
not lose data.
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Specifications
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