HD64F3028F25 Datasheet, PDF (623/925 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

18.5 On-Board Programming Mode
When pins are set to on-board programming mode and a reset-start is executed, the chip enters the
on-board programming state in which on-chip flash memory programming, erasing, and verifying
can be carried out. There are two operating modes in this mode—boot mode and user program
mode. The pin settings for entering each mode are shown in table 18.6. For a diagram of the
transitions to the various flash memory modes, see figure 18.2.
Boot mode and user program mode cannot be used in the H8/3028F-ZTAT’s mode 6 (on-chip
ROM enabled).
Table 18.6 On-Board Programming Mode Settings
Mode
Boot mode
Mode 5
Mode 7
FWE
1^*1
MD2
0^*2
0^*2
MD1
0
1
MD0
1
1
User program mode Mode 5
1
0
1
Mode 7
1
1
1
Notes: 1. For the High level input timing, see items 6 and 7 of Notes on Use of Boot Mode.
2. In boot mode, the MD2 setting should be the inverse of the input.
In the boot mode in the H8/3028F-ZTAT, the levels of the mode pins (MD2 to MD0) are
reflected in mode select bits 2 to 0 (MDS2 to MDS0) in the mode control register
(MDCR).
Rev. 2.00, 09/03, page 591 of 890