H8SXSLASH1663M datasheet(1178/1504 Pages) RENESAS

1178 / 1504 page

Section 25 Flash Memory

Rev. 2.00 Sep. 24, 2008 Page 1146 of 1468

REJ09B0412-0200

After all user MAT are automatically erased, the state of waiting for

programming/erasing command is entered. When the programming command is received,

the state shifts to the state of waiting for programming data. The same applies to erasing.

In addition to the commands for programming/erasing, there are commands for

performing sum check, blank check (erasure check), and memory read of the user MAT,

and acquiring the current status information.

(3)

Notes on USB Boot Mode Execution

• The clock of 48 MHz needs to be supplied to the USB module. Set the external clock

frequency and clock pulse generator so as to supply 48 MHz as the clock for the USB (cku).

For details, refer to section 27, Clock Pulse Generator.

• Use the PM4 pin for the D+ pull-up control connection.

• For the stable supply of the power during the flash memory programming and erasing, the

cable should not be connected via the bus powered HUB.

• If the bus powered HUB is disconnected during the flash memory programming and erasing,

permanent damage to the LSI may result.

• If the USB bus in the bus power mode enters the suspend mode, this does not make the

transition to the software standby mode in the power-down state.

H8SX/1663M Datasheet(PDF) 1178 Page - Renesas Technology Corp