r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 979

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

• 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 22.13.
Table 22.13 Inquiry and Selection Commands
The selection commands should be sent by the host in this order: device selection (H'10), clock-
mode selection (H'11), new bit rate selection (H'3F). These commands are mandatory. If the same
selection command is sent two or more times, the command that is sent last is effective.
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
Inquiry on supported
devices
Device selection
Inquiry on clock modes Requests the number of available clock modes and their
Clock-mode selection
Inquiry on frequency
multipliers
Inquiry on operating
frequency
Inquiry on user boot
MATs
Inquiry on user MATs
Inquiry on erasure
blocks
Inquiry on
programming size
New bit rate selection
Transition to
programming/erasure
state
Inquiry on boot
program state
Function
Requests the device codes and their respective boot
program names.
Selects a device code.
respective values.
Selects a clock mode.
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.
Requests the minimum and maximum values for operating
frequency of the main clock and peripheral clock.
Requests the number of user boot MAT areas along with
their start and end addresses.
Requests the number of user MAT areas along with their
start and end addresses.
Requests the number of erasure blocks along with their
start and end addresses.
Requests the unit of data for programming.
Selects a new bit rate.
On receiving this command, the boot program erases the
user MAT and user boot MAT and enters the
programming/erasure state.
Requests information on the current state of boot
processing.
Rev. 1.00 Sep. 21, 2007 Page 953 of 1124
Section 22 Flash Memory
REJ09B0402-0100