HD64F2149YV datasheet(737/1075 Pages) RENESAS

737 / 1075 page

Section 22 ROM

Rev. 3.00 Jan 18, 2006 page 709 of 1044

REJ09B0280-0300

2. Ports with multiplexed address functions will output a low level as the address signal if

mode pin setting is for mode 1 is entered during a reset. In other modes, the port pins

go to the high-impedance state. The bus control output signals will output a high level

if mode pin setting is for mode 1 is entered during a reset. In other modes, the port pins

go to the high-impedance state.

22.6.2

User Program Mode

When set to user program mode, the chip can program and erase its flash memory by executing a

user program/erase control program. Therefore, on-board reprogramming of the on-chip flash

memory can be carried out by providing an on-board means of supplying programming data, and

storing a program/erase control program in part of the program area as necessary.

To select user program mode, select a mode that enables the on-chip flash memory (mode 2 or 3).

In this mode, on-chip supporting modules other than flash memory operate as they normally

would in mode 2 and 3.

The flash memory itself cannot be read while the SWE bit is set to 1 to perform programming or

erasing, so the control program that performs programming and erasing should be run in on-chip

RAM or external memory.

Figure 22.11 shows the procedure for executing the program/erase control program when

transferred to on-chip RAM.

HD64F2149YV Datasheet(PDF) 737 Page - Renesas Technology Corp