HD6433044 Datasheet, PDF (626/867 Pages) Hitachi Semiconductor – Hitachi Single-Chip Microcomputer

Table 18-21 PROM Mode Commands
Command
Cycles Mode
Memory read
1
Write
Erase setup/erase
2
Write
Erase-verify
2
Write
Auto-erase setup/
2
auto-erase
Write
Program setup/
2
program
Write
Program-verify
2
Write
Reset
2
Write
PA: Program address
EA: Erase-verify address
RA: Read address
PD: Program data
PVD: Program-verify output data
EVD: Erase-verify output data
1st Cycle
Address
X
X
EA
X
Data
H'00
H'20
H'A0
H'30
X
H'40
X
H'C0
X
H'FF
Mode
Read
Write
Read
Write
2nd Cycle
Address Data
RA
Dout
X
H'20
X
EVD
X
H'30
Write PA
PD
Read X
Write X
PVD
H'FF
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