p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 571

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Confirmation
• Confirmation, H'06 (1 byte): Confirmation of a new bit rate
Response
• Response, H'06 (1 byte): Response to confirmation of a new bit rate
The sequence of new bit rate selection is shown in figure 19.22.
(6)
The boot program will transfer the erasing program, and erase the user MATs and user boot MATs
in that order in response to the transition to the programming/erasing state command. On
completion of this erasure, ACK will be returned and a transition made to the
programming/erasing state.
Before sending the programming selection command or program data, the host should select the
LSI device with the device selection command, the clock mode with the clock mode selection
command, and the new bit rate with the new bit rate selection command, and then send the
transition to programming/erasing state command.
When the new bit rate is selectable, the rate will be set in the register after sending ACK in
response. The host will send an ACK with the new bit rate for confirmation and the boot
program will response with that rate.
Transition to Programming/Erasing State
Waiting for one-bit period
Setting a new bit rate
at the specified bit rate
Error (%) = {[
Host
H'06
H'06
(N + 1) × B × 64 × 2
Figure 19.22 Sequence of New Bit Rate Selection
φ × 10
H'06 (ACK) with the new bit rate
H'06 (ACK) with the new bit rate
6
Setting a new bit rate
(2×n − 1)
H'06 (ACK)
] − 1} × 100
Section 19 Flash Memory (0.18-µm F-ZTAT Version)
Rev. 1.00 Sep. 21, 2006 Page 533 of 658
Setting a new bit rate
Boot program
REJ09B0310-0100