Prom Mode; Setting To Prom Mode; Memory Map - Renesas H8 Series Hardware Manual

Section 6 ROM
6.2

PROM Mode

6.2.1

Setting to PROM Mode

If the on-chip ROM is PROM, setting the chip to PROM mode stops operation as a
microcontroller and allows the PROM to be programmed in the same way as the standard
HN27C256 EPROM. Table 6.1 shows how to set the chip to PROM mode.
Table 6.1 Setting to PROM Mode
Pin Name
TEST
PB /AN
4 4
PB /AN
5 5
PB /AN
6 6
6.2.2

Memory Map

Figure 6.2 shows a memory map.
When programming with a PROM programmer, be sure to specify addresses from H'0000 to
H'7FFF.
Rev. 6.00 Sep 12, 2006 page 104 of 526
REJ09B0326-0600
Setting
High level
Low level
High level
Address in
MCU mode
H'0000
H'7FFF
Figure 6.2 H8/3644 Memory Map in PROM Mode
On-chip PROM
Address in
PROM mode
H'0000
H'7FFF