D12320VF25V Datasheet, PDF (789/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 17 ROM
Reset
Bit-Rate-Adjustment
State
Inquiry/Selection
wait
Transition to
Programming/erasing
Inquiry
Selection
Operations for
Inquiry
Operations for
Selection
Operations for Erasing
User MATs and User
Boot MATs
Programming/erasing
selection wait
Programming
Operations for
Programming
Erasing
Operations for
Erasing
Checking
Operations for
Checking
Figure 17.82 Boot Program States
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 17.83.
Rev.7.00 Feb. 14, 2007 page 755 of 1108
REJ09B0089-0700