HD6433308 HITACHI [Hitachi Semiconductor], HD6433308 Datasheet - Page 252

• Manufacturer Part Number: HD6433308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: HITACHI [Hitachi Semiconductor]

13.1.1 Block Diagram
Figure 13-1 is a block diagram of the on-chip ROM.
13.2 PROM Mode
13.2.1 PROM Mode Setup
In the PROM mode of the PROM version of the H8/330, 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 13-2.
Table 13-2. Selection of PROM Mode
Pin
Mode pin MD
Mode pin MD
STBY pin
Pins P8
0
and P8
1
0
1
Figure 13-1. Block Diagram of On-Chip ROM
Even addresses
Input
Low
Low
Low
High
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
H'0000
H'0002
H'3FFE
On-chip ROM
242
Odd addresses
H'0001
H'0003
H'3FFF