BAT32G1x9 user manual | Chapter 34 Option bytes
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Rev.1.02
Chapter 34 Option bytes
34.1 Option byte functionality
BAT32G1x9 flash memory 000C0H~000C4H, 500004H is the option byte region.
The option bytes consist of user option bytes (000C0H~000C2H) and flash data protection option bytes
(000C3H, 500004H ) composition. When powered on or reset is initiated, the specified function is set with
reference to the option byte. When using this product, the following functions must be set by the option byte.
For bits that do not have configuration capabilities, you cannot change the initial value.
Note Regardless of whether or not to use each function, you must set the option byte.
34.1.1
User option bytes (000C0H~000C2H).
(1)
000C0H
○ Operation of the watchdog timer
• Allow or disallow the operation of counters.
• Allow or stop the operation of the counter in sleep/deep sleep mode.
○ The setting of the overflow timer of the watchdog
○ The setting during which the watchdog timer window is opened
○ The setting of the interval interrupt of the watchdog timer
• Use or not use interval interrupts.
(2)
000C1H
○ Setting of LVD operating mode
• Interrupt & Reset mode
• Reset mode
• Break mode
• LVD is OFF (using the external reset input of the RESETB pin).
○ Setting of LVD detection level (VLVDH, VLVDL, VLVD).
Note When the supply voltage rises, the reset state must be maintained by voltage detection circuits or external resets
before the supply voltage reaches the operating voltage range shown in
the
AC
characteristics
of the data sheet
;
When the supply voltage drops, it must be reset by transferring in
deep sleep
mode, voltage detection circuitry, or
external reset before the supply voltage falls below the operating voltage range.
The operating voltage range depends on the setting of the user option byte
(000C2H).
(3)
000C2H
○ Frequency setting of high-speed internal oscillator
•
Choose from 1MHz~32MHz, 48MHz, 64MHz.
