Start
Are all bytes the
same?
YES
Are all bytes
equal to FFH?
Password area error
Password area is normal.
YES
Figure 22-11 Password area check flowchart
(2)
Password verification to Flash memory chip erase and protect bit erase command
When a password is enable in the erase password necessity determination area as shown in Fig-
ure 22-12 and the passwords are identical data, a password area error occurs. If a password area er-
ror is determined, an ACK response to the 17th byte of CHECK SUM sends 0x41 regardless of the
password verification.
The boot program verifies 5th byte to 16th byte of receive data (password data). A password er-
ror occurs if all 12 bytes do not match. If the password error is determined, an ACK response data
to the 17th of CHECK SUM data is a password error.
The password verification is performed even if the security function is enabled.
Start
Need password ?
YES
Are all bytes the
same?
Password area error
Password area is normal.
YES
Figure 22-12 Password area check flowchart
22.3.5.4 CHECK SUM Calculation
The checksum is calculated by 8-bit addition to transmit data, dropping the carries, and taking the
two’s complement of the total sum. The controller must perform the same checksum operation in transmit-
ting checksum bytes.
Example of CHECK SUM
TMPM3V6/M3V4
22.
Flash Memory Operation
22.3 How to Reprogram Flash using Single Boot Mode
Page 470
2019-02-06
Содержание TMPM3V4
Страница 1: ...32 Bit RISC Microcontroller TX03 Series TMPM3V6 M3V4 ...
Страница 2: ... 2019 Toshiba Electronic Devices Storage Corporation ...
Страница 7: ...Revision History Date Revision Comment 2019 02 06 1 First Release ...
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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 ...
Страница 541: ...26 3 TMPM3V4FWUG TMPM3V4FSUG Type LQFP64 P 1010 0 50E LPHQVLRQV TMPM3V6 M3V4 Page 519 2019 02 06 ...
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