HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 862

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 19 ROM
Table 19.36 PROM Mode Commands
Command Name
Memory read mode
Auto-program mode
Auto-erase mode
Status read mode
Legend:
RA: Read address
PA: Program address
Notes: 1. In auto-program mode, 129 cycles are required for command writing by a simultaneous
19.20.4 Memory Read Mode
• After the end of an auto-program, auto-erase, or status read operation, the command wait state
• Command writes can be performed in memory read mode, just as in the command wait state.
• Once memory read mode has been entered, consecutive reads can be performed.
• After power-on, memory read mode is entered.
Rev.6.00 Sep. 27, 2007 Page 832 of 1268
REJ09B0220-0600
is entered. To read memory contents, a transition must be made to memory read mode by
means of a command write before the read is executed.
2. In memory read mode, the number of cycles depends on the number of address write
128-byte write.
cycles (n).
Number
of Cycles
1 + n
129
2
2
Mode
Write
Write
Write
Write
Address Data
X
X
X
X
1st Cycle
H'00
H'40
H'20
H'71
Mode
Read
Write
Write
Write
2nd Cycle
Address Data
RA
PA
X
X
Dout
Din
H'20
H'71