HD6475328-CP10 HITACHI [Hitachi Semiconductor], HD6475328-CP10 Datasheet - Page 308

• Manufacturer Part Number: HD6475328-CP10
• Description: original Hitachi CMOS microcomputer unit (MCU)
• Manufacturer: HITACHI [Hitachi Semiconductor]

17.2 PROM Mode
17.2.1 PROM Mode Setup
The PROM version of the H8/532 has a PROM mode in which the usual microcomputer functions
are halted to allow the on-chip PROM to be programmed. The programming method is the same
as for the HN27C256.
To select the PROM mode, apply the signal inputs listed in table 17-2.
Table 17-2 Selection of PROM Mode
Pin
Mode pins (MD
STBY pin
P6
1
and P6
0
2
Addresses
, MD
H'7FFF
H'0000
H'0002
1
, and MD
Figure 17-1 Block Diagram of On-Chip ROM
Even addresses
0
)
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
Input
Low
Low
High
On-chip ROM
296
Odd addresses