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TMP86FH46NG Datasheet(PDF) 11 Page - Toshiba Semiconductor |
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TMP86FH46NG Datasheet(HTML) 11 Page - Toshiba Semiconductor |
11 / 32 page 86FH46-11 2007-08-07 TMP86FH46 2.6 Operation Mode There are four operating modes in serial PROM mode: Flash memory writing mode, RAM loader mode, flash memory SUM output mode and product discrimination code output mode. For details about these modes, refer to (1) Flash memory writing mode through (4) Product discrimination code output mode. (1) Flash memory writing mode The data are written to the specified flash memory addresses. The controller should send the write data in the Intel Hex format (Binary). For details of writing data format, refer to 2.7 “Flash Memory Writing Data Format”. If no errors are encountered till the end record, the SUM of 16 Kbytes of flash memory is calculated and the result is returned to the controller. To execute the flash memory writing mode, the TMP86FH46 checks the passwords except a blank product. If the passwords did not match, the program is not executed. (2) RAM loader mode The RAM loader transfers the data into the internal RAM that has been sent from the controller in Intel Hex format. When the transfer has terminated normally, the RAM loader calculates the SUM and sends the result to the controller before it starts executing the user program. After sending of SUM, the program jumps to the start address of RAM in which the first transferred data has been written. This RAM loader function provides the user's own way to control on-board programming. To execute the RAM loader mode, the TMP86FH46 checks the passwords except a blank product. If the passwords did not match, the program is not executed. (3) Flash memory SUM output mode The SUM of 16 Kbytes of flash memory is calculated and the result is returned to the controller. The BOOT ROM does not support the reading function of the flash memory. Instead, it has this SUM command to use. By reading the SUM, it is possible to manage Revisions of application programs. (4) Product discrimination code output mode The product discrimination code is output as a 13-byte data, that includes the start address and the end address of ROM. (In case of TMP86FH46, the start address is C000H and the end address is FFFFH.) Therefore, the controller can recognize the device information by using this function. |
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