H8SXSLASH1663R datasheet(1174/1504 Pages) RENESAS

1174 / 1504 page

Section 25 Flash Memory

Rev. 2.00 Sep. 24, 2008 Page 1142 of 1468

REJ09B0412-0200

1. After SCI boot mode is initiated, the bit rate of the SCI_4 is adjusted with that of the host.

2. Inquiry information about the size, configuration, start address, and support status of the user

MAT is transmitted to the host.

3. After inquiries have finished, all user MAT and user boot MAT are automatically erased.

4. When the program preparation notice is received, the state of waiting for program data is

entered. The start address of the programming destination and program data must be

transmitted after the programming command is transmitted. When programming is finished,

the start address of the programming destination must be set to H'FFFFFFFF and transmitted.

Then the state of waiting for program data is returned to the state of waiting for

programming/erasing command. When the erasure preparation notice is received, the state of

waiting for erase block data is entered. The erase block number must be transmitted after the

erasing command is transmitted. When the erasure is finished, the erase block number must be

set to H'FF and transmitted. Then the state of waiting for erase block data is returned to the

state of waiting for programming/erasing command. Erasure must be executed when the

specified block is programmed without a reset start after programming is executed in SCI boot

mode. When programming can be executed by only one operation, all blocks are erased before

entering the state of waiting for programming/erasing command or another command. Thus, in

this case, the erasing operation is not required. The commands other than the

programming/erasing command perform sum check, blank check (erasure check), and memory

read of the user MAT/user boot MAT and acquisition of current status information.

Memory read of the user MAT/user boot MAT can only read the data programmed after all user

MAT/user boot MAT has automatically been erased. No other data can be read.

H8SX/1663R Datasheet(PDF) 1174 Page - Renesas Technology Corp