tmp88f846ug TOSHIBA Semiconductor CORPORATION, tmp88f846ug Datasheet - Page 210

• Manufacturer Part Number: tmp88f846ug
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

19.6 Operation Mode
19. Serial PROM Mode
Note 6: If the read protection is enabled or a password error occurs, TMP88F846UG stops UART communication and enters the
Note 7: If an error occurs during the reception of a password address or a password string, TMP88F846UG stops UART commu-
Note 8: Do not write only the address from FFFE0H to FFFFFH when all flash memory data is the same. If only these area are
Note 9: To rewrite data to Flash memory addresses at which data (including FFH) is already written, make sure to erase the exist-
Description of the flash memory writing mode
comparison start address, TMP88F846UG stops UART communication and enters the halt condition. Therefore, when a
password error occurs, initialize TMP88F846UG by the
halt confition. In this case, initialize TMP88F846UG by the
nication and enters the halt condition. In this case, initialize TMP88F846UG by the
PROM mode.
written, the subsequent operation can not be executed due to password error.
ing data by "sector erase" or "chip erase" before rewriting data.
1. The 1st byte of the received data contains the matching data. When the serial PROM mode is acti-
2. When receiving the matching data (5AH), the device transmits an echo back data (5AH) as the second
3. The 3rd byte of the received data contains the baud rate modification data. The five types of baud rate
4. Only when the 3rd byte of the received data contains the baud rate modification data corresponding to
5. The 5th byte of the received data contains the command data (30H) to write the flash memory.
6. When the 5th byte of the received data contains the operation command data shown in Table 19-6, the
7. The 7th byte contains the data for 23 to 16 bits of the password count storage address. When the data
8. The 9th byte contains the data for 15 to 8 bits of the password count storage address. When the data
9. The 11th byte contains the data for 7 to 0 bits of the password count storage address. When the data
10. The 13th byte contains the data for 23 to 16 bits of the password comparison start address. When the
11. The 15th byte contains the data for 15 to 8 bits of the password comparison start address. When the
12. The 17th byte contains the data for 7 to 0 bits of the password comparison start address. When the
13. The 19th through m’th bytes contain the password data. The number of passwords becomes the data
vated, TMP88F846UG (hereafter called device), waits to receive the matching data (5AH). Upon
reception of the matching data, the device automatically adjusts the UART’s initial baud rate to 9600
bps.
byte data to the external controller. If the device can not recognize the matching data, it does not
transmit the echo back data and waits for the matching data again with automatic baud rate adjust-
ment. Therefore, the external controller should transmit the matching data repeatedly till the device
transmits an echo back data. The transmission repetition count varies depending on the frequency of
device. For details, refer to Table 19-5.
modification data shown in Table 19-4 are available. Even if baud rate is not modified, the external
controller should transmit the initial baud rate data (28H: 9600 bps).
the device's operating frequency, the device echoes back data the value which is the same data in the
4th byte position of the received data. After the echo back data is transmitted, baud rate modification
becomes effective. If the 3rd byte of the received data does not contain the baud rate modification
data, the device enters the halts condition after sending 3 bytes of baud rate modification error code
(62H).
device echoes back the value which is the same data in the 6th byte position of the received data (in
this case, 30H). If the 5th byte of the received data does not contain the operation command data, the
device enters the halt condition after sending 3 bytes of the operation command error code (63H).
received with the 7th byte has no receiving error, the device does not send any data. If a receiving
error or password error occurs, the device does not send any data and enters the halt condition.
received with the 9th byte has no receiving error, the device does not send any data. If a receiving
error or password error occurs, the device does not send any data and enters the halt condition.
received with the 11th byte has no receiving error, the device does not send any data. If a receiving
error or password error occurs, the device does not send any data and enters the halt condition.
data received with the 13th byte has no receiving error, the device does not send any data. If a receiv-
ing error or password error occurs, the device does not send any data and enters the halt condition.
data received with the 15th byte has no receiving error, the device does not send any data. If a receiv-
ing error or password error occurs, the device does not send any data and enters the halt condition.
data received with the 17th byte has no receiving error, the device does not send any data. If a receiv-
ing error or password error occurs, the device does not send any data and enters the halt condition.
(N) stored in the password count storage address. The external password data is compared with N-
Page 200
RESET
RESET
pin and reactivate the serial ROM mode.
pin and reactivate the serial ROM mode.
RESET
pin and reactivate the serial
TMP88F846UG