Datasheet

Section 7 ROM
REJ09B0465-0300 Rev. 3.00 Page 173 of 982
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
(2) State Transition
Figure 7.4 shows the state transitions in boot mode.
4.
3.
2.
1.
4.
2.
Boot mode is initiated.
(reset in boot mode)
Waits for an inquiry/
selection command.
Adjusts bit rates.
Executes processing
in response to the inquiry/
selection command.
Waits for a programming/
erasure command.
Executes processing
in response to the reading/
checking command.
Waits for erasure
block information.
Waits for the
programming data.
Erases the entire
user ROM area.
Receives H'55.
Receives an inquiry/
selection command.
Responds to the inquiry/
selection command.
Receives a reading/checking command.
Responds to the command.
(Receives an erasure
selection command.)
(The erasure block
is specified.)
(Completes
erasure.)
(Receives a programming
selection command.)
(Completes
programming.)
(Adjusts bit rates.)
Receives H'00, ..., H'00.
Transmits H'00.
(Signals adjustment completion.)
(Receives an programming/
erasure state transition
command)
Figure 7.4 State Transitions in Boot Mode