r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 1081

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

21.5
The following describes the software commands. A command or data should be read or written in
16-bit units at an even address in the user ROM or data flash area. When a command code is
written, the upper eight bits (D15 to D8) are ignored.
Table 21.5 List of Software Commands
[Legend]
SRD:
WA0:
WA1:
WD0:
WD1:
BA:
×:
xx:
Software
Command
Read array
Read status
register
Clear status
register
Program
Block erase
Block blank
check
Status register data (D7 to D0)
Address to write the lower word (the address for the first bus cycle must be the same even
Address to write the upper word
Lower word of write data (16 bits)
Upper word of write data (16 bits)
Highest address of the block (note that this should be an even address).
A desired even address in program ROM1, program ROM2, or data flash.
Upper eight bits of command code (ignored)
address as that for the second bus cycle).
Software Commands
Mode Address
Write
Write
Write
Write
Write
Write
First Bus Cycle
×
×
×
WA0
×
×
Data
(D15 to
D0)
H’xxFF
H’xx70
H’xx50
H’xx41
H’xx20
H’Xx25 Write
Mode Address
Read
Write
Write
Second Bus Cycle
×
WA0
BA
BA
Rev. 1.00 Sep. 19, 2008 Page 1053 of 1270
WD0
H’xxD0
H’xxD0
Data
(D15 to
D0)
SRD
Mode Address
Write
Section 21 Flash Memory
Third Bus Cycle
WA1
REJ09B0466-0100
Data
(D15 to
D0)
WD1