Renesas H8S/2100 Series Hardware Manual page 814

Section 24 Flash Memory
1. Programming
Programming is executed by the programming selection and 128-byte programming
commands.
Firstly, the host should send the programming selection command.
After issuing the programming selection command, the host should send the 128-byte
programming command. The 128-byte programming command that follows the selection
command represents the data programmed according to the method specified by the selection
command. When more than 128-byte data is programmed, 128-byte commands should
repeatedly be executed. Sending a 128-byte programming command with H'FFFFFFFF as the
address will stop the programming. On completion of programming, the boot program will
wait for selection of programming or erasing.
Where the sequence of programming operations that is executed includes programming with
another method or of another MAT, the procedure must be repeated from the programming
selection command.
The sequence for the programming selection and 128-byte programming commands is shown
in figure 24.22.
Repeat
Rev. 1.00 May 09, 2008 Page 788 of 954
REJ09B0462-0100
Host
Programming selection (H'42, H'43)
128-byte programming (address, data)
128-byte programming (H'FFFFFFFF)
Figure 24.22 Programming Sequence
ACK
ACK
ACK
Boot program
Transfer of the
programming
program
Programming