CC3220 Datasheet, PDF (64/84 Pages) Texas Instruments – SimpleLink Wi-Fi Wireless and Internet-of-Things Solution, a Single-Chip Wireless MCU

CC3220
SWAS035A – SEPTEMBER 2016 – REVISED FEBRUARY 2017
www.ti.com
START ADDRESS
0xE004 1000
0xE004 2000
Table 5-5. Memory Map (continued)
END ADDRESS
0xE004 1FFF
0xE00F FFFF
DESCRIPTION
Reserved for embedded trace macrocell (ETM)
Reserved
COMMENT
5.9 Restoring Factory Default Configuration
The device has an internal recovery mechanism that allows rolling back the file system to its predefined
factory image or restoring the factory default parameters of the device. The factory image is kept in a
separate sector on the sFLASH in a secure manner and cannot be accessed from the host processor. The
following restore modes are supported:
• None—no factory restore settings
• Enable restore of factory default parameters
• Enable restore of factory image and factory default parameters
The restore process is performed by calling SW APIs, or by pulling or forcing SOP[2:0] = 110 pins and
toggling the nRESET pin from low to high.
The process is fail-safe and resumes operation if a power failure occurs before the restore is finished. The
restore process typically takes about 8 seconds, depending on the attributes of the serial flash vendor.
5.10 Boot Modes
5.10.1 Boot Mode List
The CC3220x device implements a sense-on-power (SoP) scheme to determine the device operation
mode.
SoP values are sensed from the device pin during power up. This encoding determines the boot flow.
Before the device is taken out of reset, the SoP values are copied to a register and used to determine the
device operation mode while powering up. These values determine the boot flow as well as the default
mapping for some of the pins (JTAG, SWD, UART0). Table 5-6 lists the pull configurations.
NAME
UARTLOAD
FUNCTIONAL_2WJ
FUNCTIONAL_4WJ
UARTLOAD_FUNCTIONAL_4WJ
Table 5-6. CC3220x Functional Configurations
SOP[2]
Pullup
Pulldown
Pulldown
Pulldown
SOP[1]
Pulldown
Pulldown
Pulldown
Pullup
SOP[0]
Pulldown
Pullup
Pulldown
Pulldown
SoP MODE
COMMENT
LDfrUART
Factory, lab flash, and SRAM loads
through the UART. The device waits
indefinitely for the UART to load code.
The SOP bits then must be toggled to
configure the device in functional mode.
Also puts JTAG in 4-wire mode.
Fn2WJ
Functional development mode. In this
mode, 2-pin SWD is available to the
developer. TMS and TCK are available
for debugger connection.
Fn4WJ
Functional development mode. In this
mode, 4-pin JTAG is available to the
developer. TDI, TMS, TCK, and TDO are
available for debugger connection.
LDfrUART_Fn4WJ
Supports flash and SRAM load through
UART and functional mode. The MCU
bootloader tries to detect a UART break
on UART receive line. If the break signal
is present, the device enters the
UARTLOAD mode, otherwise, the device
enters the functional mode. TDI, TMS,
TCK, and TDO are available for
debugger connection.
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Detailed Description
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