CC3200MODR1M2AMOBT datasheet(49/66 Pages) TI

49 / 66 page

M4PowerON

EnableClktoM4,Release

ResettoM4

CortexLoadsthePCwithcontentsof

0x4location,whichisinROMandpart

ofBootCode.

Device-Init

done?

ExecuteDeviceInit

(FromSecureROM)

Clear

Device-Init-Done

SOP=UARTLOAD

Invoke

downloader

Downloadthecodeusing

SLProgrammerandjump

totheapplication

InfiteLoop

Valid Appscodein

SFLASH?

yes

SWAS032-012

BootMode=

(Fn2WJorFn4WJ)

(SeeNote.)

BootMode=LDfrUART

(SeeNote.)

yes

Jumptotheusercode.

CC3200MOD

www.ti.com

SWRS166 – DECEMBER 2014

Note: For definitions of the SoP mode functional configurations, see Table 5-6.

Figure 5-3. Bootloader Flow Chart

5.9.2

Invocation Sequence/Boot Mode Selection

The following sequence of events occur during the Cortex processor boot:

1. After power-on-reset (POR), the processor starts execution.

2. The processor jumps to the first few lines (FFL) of code in the ROM to determine if the current boot is

the first device-init boot or the second MCU boot. The determination is based on the Device-Init flag in

a secure register. The Device-Init flag is set out of POR. The registers in the secure region are

accessible only in the device-init mode.

3. If the current boot is the first boot, the processor executes the device-init code from ROM.

4. At the end of the boot, the processor clears the Device-Init flag and changes the master ID of the

processor and the DMA. These registers are part of the secure region.

5. The processor resets itself, initiating a second boot.

6. During the second boot, the processor rereads the Device-Init flag, the bit is cleared, and the

processor obtains a different master ID.

7. After executing FFL and the unsecure boot code, the processor jumps to the developer code

(application).

8. For the rest of the operation (until the next power cycle), the Cortex mode is designated the MCU.

During this phase, access to the secure region is restricted.

5.9.3

Boot Mode List

The CC3200 device implements a sense-on-power (SoP) scheme to determine the device operation

mode. The device can be configured to power up in one of the three following modes:

•

Fn4WJ: Functional mode with a 4-wire JTAG mapped to fixed pins.

•

Fn2WJ: Functional mode with a 2-wire SWD mapped to fixed pins.

•

LDfrUART: UART load mode to flash the system during development and in OEM assembly line (for

example, serial flash connected to the CC3200R device).

Detailed Description

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CC3200MODR1M2AMOBT Datasheet(PDF) 49 Page - Texas Instruments

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