AN279
Rev 0.7 | 15/32
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No.
Option
Description
7
OTP
Disable
The OTP protection switch option. If the item is selected in Run mode, the protection
mechanism remains active in the Re-test mode, and the OTP forbids access. For
protection mechanisms and Re-test mode features, see the
AN290 CMT216xA User
Manual.
8
S3S Disable
S3S Bus Switch Options. If the item is selected in Run mode, the S3S bus and 1-wire
debugging interface are disabled and the chip has been encrypted and cannot enter re-
test mode at the same time. If this parameter is not selected, S3S and 1-wire can be
opened in a special mode and enters Re-test mode. More details about Re-test mode,
see
AN290 CMT216xA user manual
9
por_cal_dis
Disable the calibration option when the chip is powered on for the first time. After the
check, the chip will be banned for the first time on internal calibration processing, which
can shorten the time of the first power on to the user program execution (equivalent
power on reset time). Since the cancellation of calibration will affect the part function
modules, it is suggested to operate under the guidance of professionals.
10
Max Count
It is used to limit the maximum times of burning in chip configuration.
3.2.2 User-defined serial number (SN) increment function and settings
Figure 11.
CMT216xA MCU Setting Interface
（
SN setting part
）
SN Settings Enable, select whether to synchronize the ID self-add function. When SN Settings in CMT216xA
MCU Setting is selected, related configuration items is shown in the following table.
Table 11.
SN Settings in
CMT216xA MCU Setting
No.
Option
Description
1
Start Addr (Hex)
The start addresses of SyncID storing, with up to 8 bytes serial number
storing. The serial number is burned to specified address of OTP.
