HD64F36034 datasheet(127/592 Pages) RENESAS

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Section 7 ROM

Rev. 4.00 Mar. 15, 2006 Page 95 of 556

REJ09B0026-0400

7.3

On-Board Programming Modes

There are two modes for programming/erasing of the flash memory; boot mode, which enables on-

board programming/erasing, and programmer mode, in which programming/erasing is performed

with a PROM programmer. On-board programming/erasing can also be performed in user

program mode. At reset-start in reset mode, this LSI changes to a mode depending on the TEST

pin settings,

NMI pin settings, and input level of each port, as shown in table 7.1. The input level

of each pin must be defined four states before the reset ends.

When changing to boot mode, the boot program built into this LSI is initiated. The boot program

transfers the programming control program from the externally-connected host to on-chip RAM

via the SCI3. After erasing the entire flash memory, the programming control program is

executed. This can be used for programming initial values in the on-board state or for a forcible

return when programming/erasing can no longer be done in user program mode. In user program

mode, individual blocks can be erased and programmed by branching to the user program/erase

control program prepared by the user.

Table 7.1

Setting Programming Modes

TEST

NMI

P85

PB0

PB1

PB2

LSI State after Reset End

User Mode

Boot Mode

Programmer Mode

[Legend]

X: Don’t care.

HD64F36034 Datasheet(PDF) 127 Page - Renesas Technology Corp