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CC3135 Datasheet(PDF) 41 Page - Texas Instruments

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Part No. CC3135
Description  SimpleLink Wi-Fi, Dual-Band Network Processor, solution for MCU applications
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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CC3135 Datasheet(HTML) 41 Page - Texas Instruments

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HOST MCU
UART
nRTS
nCTS
TX
RX
H_IRQ
CC3135R SL
UART
nRTS
nCTS
TX
RX
H_IRQ
X
HOST MCU
UART
nRTS
nCTS
TX
RX
HOST_INTR(IRQ)
nRTS
nCTS
TX
RX
HOST_INTR(IRQ)
CC3135R SL
UART
41
CC3135
www.ti.com
SWAS037 – JANUARY 2019
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Product Folder Links: CC3135
Specifications
Copyright © 2019, Texas Instruments Incorporated
(1)
The SimpleLink device does not support automatic detection of the host length while using the UART interface.
5.18.3 Host UART Interface
The SimpleLink device requires the UART configuration described in Table 5-24.
Table 5-24. SimpleLink™ UART Configuration
PROPERTY
SUPPORTED CC3135 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
Rising edge or level 1
Endianness
Little-endian only(1)
5.18.3.1 5-Wire UART Topology
Figure 5-18 shows the typical 5-wire UART topology comprised of four standard UART lines plus one IRQ
line from the device to the host controller to allow efficient low-power mode.
This topology is recommended because the configuration offers the maximum communication reliability
and flexibility between the host and the SimpleLink device.
Figure 5-18. 5-Wire UART Topology
5.18.3.2 4-Wire UART Topology
The 4-wire UART topology eliminates the host IRQ line (see Figure 5-19). Using this topology requires
meeting one of the following conditions:
The host is always awake or active.
The host goes to sleep, but the UART module has receiver start-edge detection for auto wakeup and
does not lose data.
Figure 5-19. 4-Wire UART Configuration


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