R5F72115D160FPV datasheet(977/1228 Pages) RENESAS

977 / 1228 page

Section 21 Flash Memory

Rev. 2.00 May. 08, 2008 Page 953 of 1200

REJ09B0344-0200

(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

Command Name

Function

H'20

Inquiry on supported

devices

Requests the device codes and their respective boot

program names.

H'10

Device selection

Selects a device code.

H'21

Inquiry on clock modes Requests the number of available clock modes and their

respective values.

H'11

Clock-mode selection

Selects a clock mode.

H'22

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.

H'23

Inquiry on operating

frequency

Requests the minimum and maximum values for operating

frequency of the main clock and peripheral clock.

H'24

Inquiry on user boot

MATs

Requests the number of user boot MAT areas along with

their start and end addresses.

H'25

Inquiry on user MATs

Requests the number of user MAT areas along with their

start and end addresses.

H'26

Inquiry on erasure

blocks

Requests the number of erasure blocks along with their

start and end addresses.

H'27

Inquiry on

programming size

Requests the unit of data for programming.

H'3F

New bit rate selection

Selects a new bit rate.

H'40

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.

H'4F

Inquiry on boot

program state

Requests information on the current state of boot

processing.

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