SH7211 Datasheet, PDF (977/1228 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family

Section 21 Flash Memory
(4) Inquiry-and-Selection State
In this state, the boot program returns information on the flash ROM in response to inquiry
commands sent from the host, and selects the device, clock mode, and bit rate in response to the
respective selection commands.
The inquiry and selection commands are listed in table 21.12.
Table 21.12 Inquiry and Selection Commands
Command
H'20
H'10
H'21
H'11
H'22
H'23
H'24
H'25
H'26
H'27
H'3F
H'40
H'4F
Command Name
Function
Inquiry on supported Requests the device codes and their respective boot
devices
program names.
Device selection
Selects a device code.
Inquiry on clock modes Requests the number of available clock modes and their
respective values.
Clock-mode selection Selects a clock mode.
Inquiry on frequency
multipliers
Requests the number of clock signals for which frequency
multipliers and divisors are selectable, the number of
multiplier and divisor settings for the respective clocks, and
the values of the multipliers and divisors.
Inquiry on operating
frequency
Requests the minimum and maximum values for operating
frequency of the main clock and peripheral clock.
Inquiry on user boot
MATs
Requests the number of user boot MAT areas along with
their start and end addresses.
Inquiry on user MATs Requests the number of user MAT areas along with their
start and end addresses.
Inquiry on erasure
blocks
Requests the number of erasure blocks along with their
start and end addresses.
Inquiry on
programming size
Requests the unit of data for programming.
New bit rate selection Selects a new bit rate.
Transition to
programming/erasure
state
On receiving this command, the boot program erases the
user MAT and user boot MAT and enters the
programming/erasure state.
Inquiry on boot
program state
Requests information on the current state of boot
processing.
Rev. 2.00 May. 08, 2008 Page 953 of 1200
REJ09B0344-0200