HD6435348R Hitachi Semiconductor, HD6435348R Datasheet - Page 317

• Manufacturer Part Number: HD6435348R
• Description: Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

17.2 PROM Mode
17.2.1 PROM Mode Setup
The PROM version has a PROM mode in which the usual microcomputer functions of the H8/534
or H8/536 are halted to allow the on-chip PROM to be programmed.
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
H'7FFE
H8/534
H'0000
H'0002
2
, MD
Addresses
1
, and MD
H'F67E
H8/536
H'0000
H'0002
Figure 17-1 Block Diagram of On-Chip ROM
0
)
Even addresses
Input
Low
Low
High
Internal data bus (upper 8 bits)
Internal data bus (lower 8 bits)
On-chip ROM
304
Odd addresses