R5F72115D160FPV datasheet(992/1228 Pages) RENESAS

992 / 1228 page

Section 21 Flash Memory

Rev. 2.00 May. 08, 2008 Page 968 of 1200

REJ09B0344-0200

(8)

Programming

Programming is performed by issuing a programming-selection command and the 256-byte

programming command.

Firstly, the host issues the programming-selection command to select the MAT to be programmed.

Two programming-selection commands are provided for the selection of either of the two target

areas.

1. Selection of user boot MAT programming

2. Selection of user MAT programming

Next, the host issues a 256-byte programming command. 256 bytes of data for programming by

the method selected by the preceding programming selection command are expected to follow the

command. To program more than 256 bytes, repeatedly issue 256-byte programming commands.

To terminate programming, the host should send another 256-byte programming command with

the address H'FFFFFFFF. On completion of programming, the boot program waits for the next

programming/erasure selection command.

To then program the other MAT, start by sending the programming select command.

The sequence of programming by programming-selection and 256-byte programming commands

is shown in figure 21.23.

Host

Boot program

Programming selection (H'42, H'43)

ACK

256-byte programming (address and data)

ACK

256-byte programming (H'FFFFFFFF)

ACK

Transfer the program

that performs

programming

Programming

Repeat

Figure 21.23 Sequence of Programming

R5F72115D160FPV Datasheet(PDF) 992 Page - Renesas Technology Corp