H8S2426 Datasheet, PDF (1094/1302 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer H8S Family / H8S/2400 Series

Section 21 Flash Memory
(2) Bit-Rate-Adjustment State
The bit rate is calculated by measuring the period of transfer of a low-level byte (H'00) from the
host. The bit rate can be changed by the command for a new bit rate selection. After the bit rate
has been adjusted, the boot program enters the inquiry and selection state. The bit-rate-adjustment
sequence is shown in figure 21.9.
Host
Boot Program
H'00 (30 times maximum)
H'00 (Completion of adjustment)
H'55
H'E6 (Boot response)
H'FF (error)
Measuring the
1-bit length
Figure 21.9 Bit-Rate-Adjustment Sequence
Rev. 1.00 Sep. 19, 2008 Page 1066 of 1270
REJ09B0466-0100