HD64F3644PV Datasheet, PDF (126/551 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

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
PB4/AN4
PB5/AN5
PB6/AN6
Setting
High level
Low level
High level
6.2.2 Memory Map
Figure 6.2 shows a memory map.
Address in
MCU mode
H'0000
Address in
PROM mode
H'0000
On-chip PROM
H'7FFF
H'7FFF
Figure 6.2 H8/3644 Memory Map in PROM Mode
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