CC2340R2: CC2340R2 incomplete Documentation

Hello AB,

I appreciate your candid feedback and have notified the TRM developers about your grievances.  They will also be able to support your reference design questions.

About entering low-power modes on the CC2340R devices, it is true that the Power TI Driver is the preferred method for managing this behavior.  If there exist bugs in the driver then bug tickets are filed to review and fix such errors.  However it is possible to subvert any TI Driver solution and use your own low-power firmware.

• In the Power module of the SysConfig file, use "Custom" for both the Policy Function and Policy Init Functions, then choose the custom function naming conventions.
• In your application code, define the aforementioned functions using the <sdk_install_directory>\simplelink_lowpower_f3_sdk_9_11_00_18\kernel\nortos\dpl\PowerCC23X0_nortos.c (or similar for freertos) and <sdk_install_directory>\source\ti\drivers\power\PowerCC23X0.c as reference guides for PowerCC23X0_standbyPolicy, Power_init, Power_shutdown, Power_sleep, and PowerCC23X0_enterStandby functions.  
• These will detail the registers and driverlib functions necessary to enter/exit from low-power modes.
• Exercise caution when entering these low-power states as this will prevent peripherals from operating (examples include UART, LGPT, and ADC which depend on the high-frequency clock).

Hope this helps,
Ryan

Hello Tech Team,

There are serious glitches in ur software package of this forum. The text of my original question is all missing except one line above ending with *****>. Therefore I am rewriting the same below. (I am glad I had saved that text in my computer.)

we are planning to use CC2340R2 wireless SoC and MSPM0G35 MCU in our new product line (10-12 devices). While MSPM0G35 documentation in the DS and the Tech Reference Manual is well written, some essential info in the CC2340R2 DS and Tech Reference Manual is inadequate/missing. I have spent more than 3-4 days searching through DS and Tech Ref Manual (1300+ pages), and still did not find.

I am looking for the specific info - how to enter each Operating Mode (Power Mode) and how to exit.

Searching on the Internet and TI Tech Forum, the only answers I found was how to do it in the software - TI's drivers etc. We are NOT looking for such info which is obvious. (What if there are bugs in the driver...?)  Software has to implement this function at the hardware level - configuring some control registers (at the bit level) of the chip, and executing some specific instructions similar to MSPM0G35.

1) Operating Modes of MSPM0G35  -  Section 8.2 of MSPM0G35 data sheet (DS) gives basic info about exiting (Wakeup) the Operating Modes, including in Table 8-1.

            Section 2.1 of the Tech Ref Manual gives detailed info about all modes, including exiting (Wakeup) info in Table 2-1. Section 2.4.2

Operating Mode Selection gives register level information about how to configure each mode. And above all, it gives info about how to Enter  each mode. We have no issues here.

2) Power Modes of CC2340R2 - In both the DS and the Tech Ref Manual, Operating modes are referred as Power Mode for this SoC. Section 8.11 Power Management of the DS gives basic info about exiting (Wakeup) the Power Modes, including in Table 8-3. There is no detail anywhere in the DS about how to exit.

Note: Is there a typo in the following line under the table 8-3:

         (2) Software-based retention of CPU registers with context save and restore when entering and exiting standby power mode

 Should the word be content and not context...? Please correct.

            2.1)  6.2 System CPU Modes of the Tech Ref Manual states:     

             "The CPU modes, Run, Sleep, and Deep Sleep, are managed by the TI Power API and cannot be directly manipulated."

            Section 6.4.2 Shutdown says: "The lowest power state that can be deliberately entered by software."  No info is given how to enter shutdown state. Basic info about Wake-up is given, but no details how.

            Further section 6.4.5 Standby describes functioning and exit (wake-up) from this mode, but no details how. No info is given how to enter Standby mode.

            Section 4.3.4.3 Power Management Controller (PMCTL) describes the Wake-up event from the Standby mode in more details, but not completely. Table 4-4 has more details on Wake-up events, but incomplete, and also there are many mistakes in the table, for example:    

                        GPIO combined wake up interrupt, interrupt flags can be found here GPIO.MIS

I searched entire manual, but GPIO.MIS is not written anywhere else.

There are similar mistakes in Table 4-18, for example:

            9h = GPIO combined wake up interrupt, interrupt flags can be found here GPIO:MIS

            Fh = SPI0 combined interrupt request, interrupt flags can be found here SPI0:MIS

Note: After lot of search, coincidentally, I found some useful info in:

                        Table 4-12. WKUPMASK Register Field Descriptions

            This table defines six  AON_..... interrupt masks register bits, e.g.:

            Wake-up mask for AON_IOC_COMB.

            0 - Wakeup Disabled

            1 - Wakeup Enabled

... just too many mistakes/issues to list.

            Section 6.11 PMCTL Registers - Table  6-71 lists/describes all registers of the Power Module Controller. The Go link goes to the specific register where bit-level details are given about how to enter a specific mode, or Enable/Disable a mode.

                        6.11.3 SHTDWN Register defines the key value A5A5h to enter Shutdown Mode. Great!

                        6.11.4 SLPCTL Register defines how to Enable/Disable Sleep Mode.

            Still no info about how to enter Standby Mode.

3) Mechanical Packaging - The Info about the chips (40 pin, 24 pin and YBG) in the DS of CC2340R2 is missing - an important one. Is it in some other document? We need this to do PCB layout design - this is a SHOW stopper, please provide this info ASAP.

Note: This Packaging info is always shown in the DS of every chip. Example: MSPM0G350x. Please update this in the next version of the DS of CC2340Rx.

RECOMMENDATION
Please write a section "Power Modes" in the DS of CC2340R2 similar to Operating Modes section in MSPM0G350x, where customers can find info at one place. And send that section and also the Mechanical Packaging info to me by email so that we can continue.

CONCLUSION

I am exhausted doing above task of finding problems with the CC2340R2 DS and Tech Ref Manual, which should have been written correctly before publishing for customers. Please escalate this issue to higher management, and assign some tech person(s) to go through both docs, and correct everything - even items I did not find time to search in 1300+ pages. At present, we have to halt our design work using this MCU. And I wonder if TI has sold any of these chips...!!!

Thanks.