Datasheet

Section 21 Flash Memory
Page 1102 of 1384 R01UH0310EJ0500 Rev. 5.00
Sep 25, 2012
H8S/2426, H8S/2426R, H8S/2424 Group
(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'E6 (Boot response)
Measuring the
1-bit length
H'00 (Completion of adjustment)
H'55
H'FF (error)
Figure 21.9 Bit-Rate-Adjustment Sequence