20.3.5 Example of Operational Procedure
The example of operational procedure is shown below.
After reset, confirms various reset factor by CGRSTFLG. If the reset factor is not by the oscillation frequen-
cy detect, enable external oscillation, set register to use OFD and enable operation. Reset output must be disa-
bled at this time.
After waiting the OFD operation is started, confirms abnormal status flag, and if there is not abnormal sta-
tus, change to external oscillation clock.
Reset
Enable external oscillation setting
Enable write register
(OFDCR1=0xF9)
OFDSTAT
<OFDBUSY>=”1” ?
Error operation
yes
no
CGRSTFLG
<OFDRSTF>=”0” ?
OFDSTAT
<FRQERR>=”1” ?
no
Error operation
yes
no
yes
Disable reset output
(OFDRST=”0”)
OFD setting
(OFDMN, OFDMX)
Enable OFD operation
(OFDCR2=0xE4)
Disable OFD operation
(OFDCR2=”0x00”)
Enable reset output
(<OFDRST
>
=”1”)
Enable OFD operation
(OFDCR2=0xE4)
Disable write register
(OFDCR1=0x06)
Figure 20-3 Example of operational procedure
TMPM3V6/M3V4
20. Oscillation Frequency Detector (OFD)
20.3 Operational Description
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Страница 2: ... 2019 Toshiba Electronic Devices Storage Corporation ...
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Страница 52: ...TMPM3V6 M3V4 3 Processor Core 3 6 Exclusive access Page 30 2019 02 06 ...
Страница 148: ...TMPM3V6 M3V4 7 Exceptions 7 6 Exception Interrupt Related Registers Page 126 2019 02 06 ...
Страница 178: ...TMPM3V6 M3V4 9 Input Output port 9 2 Block Diagrams of Ports Page 156 2019 02 06 ...
Страница 206: ...TMPM3V6 M3V4 10 16 bit Timer Event Counters TMRB 10 7 Applications using the Capture Function Page 184 2019 02 06 ...
Страница 232: ...TMPM3V6 M3V4 11 Universal Asynchronous Receiver Transmitter Circuit UART 11 4 Operation Description Page 210 2019 02 06 ...
Страница 354: ...TMPM3V6 M3V4 14 Synchronous Serial Port SSP 14 6 Frame Format Page 332 2019 02 06 ...
Страница 419: ...TMPM3V6 M3V4 Page 397 2019 02 06 ...
Страница 420: ...TMPM3V6 M3V4 16 Analog Digital Converter ADC 16 6 Timing chart of AD conversion Page 398 2019 02 06 ...
Страница 462: ...TMPM3V6 M3V4 21 Watchdog Timer WDT 21 5 Control register Page 440 2019 02 06 ...
Страница 510: ...TMPM3V6 M3V4 22 Flash Memory Operation 22 4 Programming in the User Boot Mode Page 488 2019 02 06 ...
Страница 538: ...TMPM3V6 M3V4 25 Electrical Characteristics 25 7 Recommended Oscillation Circuit Page 516 2019 02 06 ...
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